The rate of reaction of the value of KIS 3 and [A] and [B] are each 2M is: 24 (mol/L)/s (Option B)
What is rate of reaction?
In chemistry, the rate of reaction describes how quickly a chemical reaction develops.
It is frequently described in terms of either the concentration of a reactant that is spent in a unit of time or the concentration of a product that is generated in a unit of time (amount per unit volume).
What is the calculation that supports that above answer?
Recall that the rate equation is:
Rate = K[A]²[B]
Hence:
Concentration of A = 2M
Concentration of B = 2M
K = 3
Taking the values and substituting them, we have:
Rate = 3 (mol/L)⁻³/s×[2]² ×[2]
Rate = 24 (mol/L)⁻³/s
The rate of reaction can be used as a valuable diagnostic tool. We may devise strategies to increase production by learning how quickly things are created and what slows down reactions.
This knowledge is necessary for the industrial production of various chemicals, such as:
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What chemical process is responsible for the smell of vinegar in an old bottle of aspirin?
Chemical process is responsible for the smell of vinegar in an old bottle of aspirin is Hydrolysis of ester i.e. Aspirin.
Aspirin reacts with water leading to the formation of Acetic acid which is a Carboxylic acid derivative.
Aspirin on Hydrolysis forms Acetic acid and Salicylic acid.
The reaction shows up as a fizz when aspirin is added in water.
Aspirin is called Acetyl Salicylic acid and it helps to reduce:
InflammationPainFeverHeadacheArthritisMuscle painTooth painAcetic acid or Ethanoic acid is a colorless liquid. It is an important carboxylic acid. It smells like vinegar.
Acetic acid is used for production of following:
Vinyl AcetateInsecticidesRubberAcetic anhydrideSalicylic acid is a bitter compound which is colorless. It reduces acne and opens up the skin pores.
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7. Which of the following is NOT part of the Kinetic Molecular Theory?
a. All matter came from the Big Bang.
b. Matter is made of small particles called atoms.
c. Atoms are in constant motion.
d. The energy of the atoms is called heat.
What is the pH of a 1.00 M aqueous solution of a weak diprotic acid H2Y if its Ka1 is equal to 6.9x10-5 and Ka2 is equal to 5.4x10-12
The pH of the diprotic acid H2Y is =
6.15 × 10-17
Calculation of pHA diprotic acid is a type of acid that contains two hydrogen atoms in its molecules which has the ability to be replaced when involved in a chemical reaction.
A weak diprotic acid is the type of acid that yields hydronium ions and bicarbonate ions in small amounts when involved in a chemical reaction.
The pH is defined as the degree of how acidic or how basic a substance is when measured against a scale.
The Ka1 of the weak diprotic acid = 6.9x10-5
The Ka2 of the weak diprotic acid = 5.4x10-12
Using the formula;
pH = (pKa1 + pKa2)/2
pH = (6.9x10-5 + 5.4x10-12)/2
pH= 12.3 ×10-5×10-12
pH= 12.3 × 10-17/2
pH= 6.15 × 10-17
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The half-life of tritium (h) is 12 years. How long does it take for 16. 0 ng of tritium to decay to the point where 2. 0 ng remains?
Answer:
36 years
Explanation:
2 = 16 * (1/2)^n where n is the number of half lives
2/16 = (1/2)^n
1/8 = (1/2)^n
log (1/8) = log (1/2^n)
log(1/8) = n log (1/2)
log ( 1/8 ) / log(1/2) = n = 3 half lives
each half life is 12 years so 3 * 12 = 36 years
What is the celsius temperature of 100. 0 g of chlorine gas in a 55. 0-l container at 800 mm hg?
The Celsius temperature of 100. 0 g of chlorine gas is 227.65 C.
What is temperature?
Temperature is the measurement of the hotness or coldness of a body or substance or place.
Given, that the pressure is P = 800 mm Hg
Converted into pascals 1.066 X 10^5 Pa
The Volume is V = 55 l
Converted into meter cube 0.055 m^3
The number of moles of Cl2 gas will be calculated
weight / molecular weight
100.0 / 71 = 1.408
From the ideal gas equation
PV = nRT
T = PV/RT
where R = universal gas constant = 8.314 J /mol K
Putting the values in the equation:
[tex]T = \dfrac{1.006 \times 10^-5 \times 0.055}{1.408 \times 8.314 } = 500.8 K.[/tex]
T is temperature = 500.8 K
The Celsius temperature is 500.8 K = 227.65 C
Thus, the temperature in Celsius is 227.65 C.
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In the following 2 questions, determine what is being oxidized and what is being reduced in each reaction. Identify the oxidizing and reducing agents in each :
a. 2Mg(s) + O2(g) → 2MgO(s)
b. Pb(NO3)2(aq) + Zn(s) → Zn(NO3)2(aq) +Pb(s)
a) Mg is oxidized and O2 is reduced
b) Zn is oxidized while Pb(NO3)2 is reduced.
Oxidation and reductionOxidation is defined as:
loss of electronsremoval of hydrogenaddition of oxygenincrease in oxidation numberremoval of electropositive elementsReduction is defined as:
gains of electronsaddition of hydrogenremoval of oxygendecrease in oxidation numberaddition of electropositive elementsLooking at the first reaction, the Mg atom gains oxygen to become MgO. This means that Mg is oxidized. The oxidizing agent is O2. At the same time, O2 is being reduced and the reducing agent is Mg.
For the second reaction, the oxidation number of Pb is reduced from +2 to 0. Thus, Pb has been reduced by Zn while Zn itself has been oxidized. The reducing agent here is Zn while the oxidizing agent is Pb(NO3)2.
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You have twenty ml of a 90 mmol/liter solution of glucose. if you add forty ml of water, the concentration of glucose in the new solution will be:_____.
The concentration of glucose in the new solution will be
30 M mol/liter.
Subtract the solute's mass from the total volume of the solution. Using m as the solute's mass and V as the total volume of the solution, write out the equation C = m/V.
A concentrated solution is referred to as a stock solution since it will be diluted to a lesser concentration before usage. M₁V₁ = M₂V₂ is the dilution equation.
A diluted solution = stock solution.
M₁ is the stock solution's molarity.
M₂ stands for the diluted solution's molarity.
V1 is the volume of the starting solution.
V2 is the volume of the final solution.
M₁ = 90M mol/liter
V₁ = 20mL
V₂ = 40mL
Using the formula,
M₁V₁ = M₂V₂
20mL × 90 M mol/liter = 40mL × M₂
M₂ = 30 M mol/liter
Therefore, the concentration of glucose in the new solution will be
30 M mol/liter.
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Reset the simulation by clicking the reload button at the bottom right corner of the screen. move the chemistry book down again so its surface touches the surface of the physics book. quickly move the chemistry book back and forth. what’s different when the motion is faster?
The temperature of the physics book increasing as the chemistry book slides across it is the difference when motion is faster.
Because the molecules have kinetic energy, molecular motion rises with rising temperature and decreases with falling temperature. At absolute zero, molecular motion comes to a complete standstill.
What is Temperature ?This is defined as the degree of hotness or coldness of a body and it increases when there is more friction.
When motion is faster, there is an increase in friction and increase in thermal(heat) energy which leads to increase in temperature.By increasing the temperature, the velocity of the particles is accelerated. In contrast, lowering the temperature slows down the motion of the particles until it eventually stops entirely at absolute zero (0 K). The particles will have kinetic energy since they are moving.Learn more about Temperature here:
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Answer:
The speed of the particles increases for both books, and the temperature of the physics book increases even more.
Explanation:
edmentum
At what temperature will he atoms have the same crms value as N2 molecules at 25°c?
At -230 °C temperature will He atoms have the same rms value as [tex]N_{2}[/tex] molecules at 25°C .
Calculation ,
Given temperature = 25°C = 25+273 = 298 K
[tex]V_{rms}[/tex] =√3RT/M
[tex]V_{rms}[/tex] =√3R[tex]T_{1}[/tex]/[tex]M_{He}[/tex] ......( i )
[tex]V_{rms}[/tex] =√3R[tex]T_{2}[/tex]/[tex]M_{N_{2}[/tex] ......( ii )
Equalize equation ( i ) and ( ii )
√3R[tex]T_{1}[/tex]/[tex]M_{He}[/tex] = √3R[tex]T_{2}[/tex]/[tex]M_{N_{2}[/tex]
[tex]T_{1}[/tex]/[tex]M_{He}[/tex] = [tex]T_{2}[/tex]/[tex]M_{N_{2}[/tex]
[tex]T_{1}[/tex] = [tex]M_{He}[/tex] × [tex]T_{2}[/tex]/[tex]M_{N_{2}[/tex] = 4 ×298 K/28 = 42.57 K
Temperature in°C = 42.57 - 273 = -230 °C
Therefore , at -230 °C temperature will He atoms have the same rms value as [tex]N_{2}[/tex] molecules at 25°C .
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) a student makes up a 0. 6 m solution of acetic acid. (note: the pka of acetic acid is 4. 74) a) what is the poh of this solution?
A student makes up a 0. 6 M solution of acetic acid then its pOH of this solution is 13.77
Calculation ,
A figure expressing the acidity or alkalinity of a solution on a logarithmic scale on which 7 is neutral, lower values are more acid and higher values more alkaline.
We have to find pH of the acetic acid .
[ [tex]H^{+}[/tex] ] = 0. 6
pH = -㏒[ [tex]H^{+}[/tex] ]
pH = -㏒ [ 0. 6 ]
pH = 0.22
pH + pOH = 14
pOH = 14 - pOH = 14 - 0.22 = 13.77
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Which state of matter is being described below? it can be squashed easily, spreads out slowly, has low density,
Answer:
liquid
Explanation:
Gas has very low density but spreads fast. Solid has high density.
The process of releasing silver iodide into the atmosphere to stimulate rainfall is called:?
Can someone help me create energy diagrams for these three reactions?
The energy diagrams of the synthesis, single replacement, and double replacement reactions are found in the attached image.
What are energy profile diagrams?Energy profile diagrams are diagrams which illustrate the potential energy changes that occur when reactant molecule combine to form products.
The energy diagrams shows the potential energy of the reaction, the energy of the transition state of the reaction, the activation energy of the reaction, as well as the potential energy of the products.
From energy diagrams, the enthalpy change of a reaction can be determined. Also, it can also be established whether the reaction is exothermic or endothermic.
For exothermic reactions, the enthalpy change is negative since the potential energy of the reactants is greater than the potential energy of the products.
For endothermic reactions, the enthalpy change is positive since the potential energy of the reactants is less than the potential energy of the products.
Based on this therefore, the energy diagrams of the given reactions have been constructed and are found in the attached image.
In conclusion, energy diagrams are used to show energy changes occurring in a reaction.
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Why are ionic compounds like NaCl, KCl, CaCl2, PbBr2 (etc.non conductors in the solid state but conductors in aqueous solution?
Explanation:
if its the same compound what happened to make it different?
they were put in water
lot of those compounds have Cl in them making them salts
NaCl is Sodium Chloride which is regular table salt
In water, the sodium atoms and chlorine atoms separate
They move around in the water as positively and negatively charged ions.
This separation of charge allows the solution to conduct electricity.
britannica
What is the molecular geometry if you have 4 single bonds around the central atom?
Tetrahedral geometry is the molecular geometry if you have 4 single bonds around the central atom.
In a tetrahedral molecular geometry, a central atom is located at the centre with four substituents that are located at the corners of a tetrahedron. The bond angles are cos−1(−1⁄3) = 109.4712206...° ≈ 109.5° when all four substituents are the same, as in methane (CH4) as well as its heavier analogues. Methane and other perfectly symmetrical tetrahedral molecules belong to point group Td, but most tetrahedral molecules have lower symmetry. Tetrahedral molecules can be chiral.
The five basic shapes of hybridization are linear, trigonal planar, tetrahedral, trigonal bipyramidal, and octahedral. The geometry of the orbital arrangement: Linear: Two electron groups are involved resulting in sp hybridization, the angle between the orbitals is 180°.
Redistribution of the energy of orbitals of individual atoms to give orbitals of equivalent energy happens when two atomic orbitals combine to form a hybrid orbital in a molecule. This process is called hybridization. During the process of hybridization, the atomic orbitals of comparable energies are mixed together and mostly involves the merging of two ‘s’ orbitals or two ‘p’ orbitals or mixing of an ‘s’ orbital with a ‘p’ orbital as well as ‘s’ orbital with a ‘d’ orbital. The new orbitals thus formed are known as hybrid orbitals. More significantly, hybrid orbitals are quite useful in explaining atomic bonding properties and molecular geometry.
Key Features of Hybridization :
Atomic orbitals with equal energies undergo hybridization.The number of hybrid orbitals formed is equal to the number of atomic orbitals mixing.It is not necessary that all the half-filled orbitals must participate in hybridization. Even completely filled orbitals with slightly different energies can also participate.Hybridization happens only during the bond formation and not in an isolated gaseous atom.The shape of the molecule can be predicted if the hybridization of the molecule is known.The bigger lobe of the hybrid orbital always has a positive sign, while the smaller lobe on the opposite side has a negative sign.Learn more about tetrahedral molecular geometry here : https://brainly.com/question/20274710
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In the reaction below green chlorine gas and brown iodine chloride forms yellow iodine trichloride cl2 (g) icl (l) ⇌ icl3 (s) if some chlorine is removed from the reaction, how will it affect the color of the mixture? a. it will become more green. b. it will not change. c. it will become more yellow. d. it will become more brown.
If some chlorine is removed from the reaction, It will become more green and brown.
According to the principle, if a reaction system is subjected to a constraint at its equilibrium, such as a change in concentration, volume, pressure, or temperature, the equilibrium position will alter in a way that the restriction is eliminated.
What happens to chlorine when it reacts?
Hydrochloric acid and chloric acid are created when chlorine combines with water. In sunlight, a separate process takes place when water and chlorine combine to produce oxygen and hydrochloric acid.Is chlorine green or Colourless?
At room temperature, chlorine is a gas that is yellow-green. It possesses the highest electron affinity and the third-highest electronegativity on the revised Pauling scale, behind only oxygen and fluorine, making it an exceptionally reactive element and a powerful oxidising agent.Learn more about chlorine
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If an atom were scaled up to the size of a sports arena, the space filled by the positive charges inside the atom (according to the work of ernest rutherford early in this century) would be:______.
If an atom were scaled up to the size of a sports arena, the space filled by the positive charges inside the atom (according to the work of ernest Rutherford early in this century) would be very small (perhaps size of the soccer ball).
A classical atoms based on Rutherford's model is doomed to collapse. An atom has highly non-uniform mass distribution in Rutherford's model.The positively charges part of the atom possess most of the mass in Rutherford's model. The positive charge and most of the mass of the atom were densely concentrated in extremely small region . This small region is called nucleus according Rutherford's model.
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Potassium reacts with oxygen gas to produce potassium oxide. Determine the percent yield for the reaction between 8.92 grams of potassium and 3.28 grams of oxygen gas if 6.36 grams of potassium oxide are produced?
Answer:
Percent Yield K₂O = 59.2%
Explanation:
Before you can calculate the percent yield, you need to find the theoretical yield. This value is the amount of product produced using the balanced chemical equation and molar masses. However, the question does not specify which reactant is the limiting reagent. Therefore, you have to calculate the mass of the product starting from both values.
To find the theoretical yield, you need to (1) convert grams K/O₂ to moles K/O₂ (via molar masses), then (2) convert moles K/O₂ to moles K₂O (via mole-to-mole ratio from balanced equation coefficients), and then (3) convert moles K₂O to grams K₂O (via molar mass). It is important to arrange the conversions in a way that allows for the cancellation of units. The final answer should have 3 sig figs to match the sig figs of the given values.
Molar Mass (K): 39.098 g/mol
Molar Mass (O₂): 2(15.998 g/mol)
Molar Mass (O₂): 31.996 g/mol
Molar Mass (K₂O): 2(39.098 g/mol) + 15.998 g/mol
Molar Mass (K₂O): 94.194 g/mol
The balanced equation:
4 K + O₂ -----> 2 K₂O
8.92 g K 1 mole 2 moles K₂O 94.194 g
-------------- x ----------------- x -------------------- x ---------------- = 10.7 g K₂O
39.098 g 4 moles K 1 mole
3.28 g O₂ 1 mole 2 moles K₂O 94.194 g
---------------- x --------------- x --------------------- x -------------- = 19.3 g K₂O
31.996 g 1 mole O₂ 1 mole
Because potassium produces the smaller amount of product, it is the limiting reagent. This means that all the potassium reactant is used up before the oxygen gas runs out. So, the theoretical yield of potassium oxide is 10.7 grams.
Now, you can use the theoretical yield and actual yield to determine the percent yield.
Actual Yield
Percent Yield = ------------------------------ x 100%
Theoretical Yield
6.36 g K₂O
Percent Yield = ------------------------ x 100%
10.7 g K₂O
Percent Yield = 59.2%
Strontium-89 undergoes beta decay, after 88 days a sample has decreased to 30% its original size. What is the half-life of sr-89?.
The half-life of sr-89 will be 51 days.
What is a Beta decay?In nuclear physics, beta decay is a type of radioactive decay in which an atomic nucleus emits a beta particle (a fast energetic electron or positron), which changes the original nuclide into an isobar of that nuclide. Prior to beta decay, neither the beta particle nor the associated (anti-)neutrino is present in the nucleus; instead, they are produced during the decay process. This procedure gives unstable atoms a protons-to-neutrons ratio that is more stable.The weak force, which is characterized by relatively slow decay durations, results in beta decay. Up and down quarks make up nucleons, and the weak force allows a quark to change the flavor of its lepton by emitting a W boson, which produces an electron/antineutrino or positron/neutrino pair.For instance, the disintegration of a neutron, which consists of two down quarks and an up quark, produces a proton, which consists of a down quark and two up quarks.Because the fundamental nuclear mechanism, mediated by the weak force, is the same, electron capture is occasionally considered a kind of beta decay. In electron capture, a proton in the nucleus captures an inner atomic electron, turning it into a neutron, and releasing an electron neutrino.To learn more about beta decay strontium-89 click here-
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A water molecule is considered a compound because
All of the atoms in the compound have the same number of protons.
You can separate the Oxygen from the Hydrogen via chemical means.
You can separate the hydrogen atoms from the Oxygen via physical means.
You cannot separate Oxygen and Hydrogen atoms.
Please help
[tex]{ \green{ \tt{option}}} \: (b)[/tex]
[tex]{ \orange{ \bold{A \: water \: is \: considered \: as \: compound \: because}}}[/tex]
[tex]{ \red{ \tt{you \: can \: separate \: the \: oxygen \: from \: the \: hydrogen \: via \: chemical \: means}}}[/tex]
What is the molar mass of aluminum sulfate? 278.0 g/mol 315.2 g/mol 306.2 g/mol 123.0 g/mol 342.2 g/mol
The molar mass of aluminum sulfate is 342.2 g/mol.
The molar mass of aluminium sulfate Al₂(SO₄)₃, will be equal to the sum of the molar masses of all the atoms that make up a mole of this compound.
From (Al₂(SO₄)₃, 1 mole of aluminum sulfate contains;
two moles of aluminum, 2xAl
three moles of sulfur, 3xS
twelve moles of oxygen, 3x4x0
From periodic table, the molar mass of aluminum, sulfur and oxygen is;
Al= 26.981538 g mol⁻¹
S= 32.065 g mol⁻¹
O=14.9994 g mol⁻¹
To find molar mass of aluminum sulfate we need to do
2xMmAl+3xMmS+12XMmO
2X26.981538 g mol⁻¹+3X32.065 g mol⁻¹+12X15.9994 g mol⁻¹
This will give Mm Al₂(SO₄)₃ = 342.150876 g mol⁻¹
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Drag each tile to the correct location. classify the chemical equations as being balanced or not balanced. 2co 2no → 2co2 n2 6co2 6h2o → c6h12o6 o2 h2co3 → h2o co2 2cu o2 → cuo
A. 2CO + 2NO → 2CO2 + N2 is a balanced equation as the number of carbon, oxygen, and nitrogen atoms are same on both sides.
B. 6CO2 + 6H2O → C6H12O6 + O2 is an imbalanced equation as oxygen atoms are not balanced here.
C. H2CO3 → H2O + CO2 is a balanced equation as same number of hydrogen, carbon, and oxygen are present on both sides.
D. 2Cu + O2 → CuO is an imbalanced equation as both copper and oxygen are imbalanced here.
What is Chemical equation ?A chemical equation is a way to depict a chemical reaction using the symbols and formulas of the components involved. For instance, when zinc metal and diluted sulfuric acid combine, zinc sulphate and hydrogen gas are produced.
Balanced and imbalanced chemical equation -
an equation in chemistry where the number of each sort of atom is equal on both sides. Subscripts are a component of the chemical formulae for the reactants and products that show how many atoms of the previous element there are in each.
The chemical equation is referred to as being imbalanced if the number of atoms of each element present in the reactants and the number of atoms of each element present in the product are not equal.
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Answer: A. 2CO + 2NO → 2CO2 + N2 is a balanced equation as the number of carbon, oxygen, and nitrogen atoms are same on both sides.
B. 6CO2 + 6H2O → C6H12O6 + O2 is an imbalanced equation as oxygen atoms are not balanced here.
C. H2CO3 → H2O + CO2 is a balanced equation as same number of hydrogen, carbon, and oxygen are present on both sides.
D. 2Cu + O2 → CuO is an imbalanced equation as both copper and oxygen are imbalanced here.
What is Chemical equation ?
A chemical equation is a way to depict a chemical reaction using the symbols and formulas of the components involved. For instance, when zinc metal and diluted sulfuric acid combine, zinc sulphate and hydrogen gas are produced.
Balanced and imbalanced chemical equation -
an equation in chemistry where the number of each sort of atom is equal on both sides. Subscripts are a component of the chemical formulae for the reactants and products that show how many atoms of the previous element there are in each.
The chemical equation is referred to as being imbalanced if the number of atoms of each element present in the reactants and the number of atoms of each element present in the product are not equal.
Explanation:
How many grams of NaCl are needed in order to make a liter of a 2.00 M NaCl solution? O 58.4 g O 117 g O 2.00 g
Answer:
B.) 117 g
Explanation:
(Step 1)
To find the mass, you need to first find the moles of NaCl using the molarity ratio.
Molarity = moles / volume (L)
2.00 M = moles / 1.0 L
2.00 = moles
(Step 2)
Now that you know the moles, you can convert it to grams using the molar mass.
Molar Mass (NaCl): 22.990 g/mol + 35.453 g/mol
Molar Mass (NaCl): 58.443 g/mol
2.00 moles NaCl 58.443 g
--------------------------- x ----------------- = 117 g NaCl
1 mole
What would cause the equilibrium to shift left in this reaction? co 3h2 ⇌ ch4 h2o
option (A) Adding heat to the product mixture is the right answer.
As the reactant side has more moles than the product side, the equilibrium of the reaction shifts to the left to decrease pressure by increasing volume.
If the temperature drops, equilibrium also moves to the left.
Given equation is co+ 3h2 ⇌ ch4+ h2o
When heat is added to the product mixture in this situation, equilibrium moves to the left.
What is meant by equilibrium?A condition where opposing forces or actions are in balance is known as equilibrium.
What two types of equilibrium are there?Equilibrium is of two types:
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Solutions having osmotic pressures less than those of body fluids are called group of answer choices isosmotic. hyperosmotic. hyposmotic. neosmotic. magnosmotic
The solutions having osmotic pressure less than those of body fluids are called as hypoosmotic , therefore option C is correct.
What is osmotic pressure?Osmotic pressure is defined as the pressure that would be required to stop water from diffusing through a barrier by osmosis.
It is essentially a colligative feature that completely depends on the solute particle concentration in the solution.
Higher concentrations and higher temperatures increase osmotic pressure.
Osmotic pressure can be calculated using the following equation:
Π = MRT
where,
Π=osmotic pressure
M=Molar concentration of solution
R=Real gas constant
T=Temperature in Kelvin
Solutions having osmotic pressure less than those of body fluids are called as hypoosmotic solutions ,hence option C is correct.
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Consider a 0.12 M solution of a weak polyprotic acid (H2A) with the possible values of Ka1 and Ka2 given here. Calculate the contributions to [H3O+] from each ionization step. At what point can the contribution of the second step be neglected?
A. Ka1=1.0×10−4 and Ka2=5.0×10−5
The [H3O+] in step 1 is 0.0034 M while the [H3O+] in step 2 is 0.00039 M
What is the contribution of each step?Let us set up the ICE table in each case, for K1;
H2A(aq) + H2O(l)--------> H3O^+(aq) + HA^-(aq)
I 0.12 0 0
C -x +x +x
E 0.12 - x x x
Ka1= [H3O^+] [HA^-]/[ H2A]
Ka1= x^2/ 0.12 - x
1.0×10^−4 = x^2/ 0.12 - x
1.0×10^−4(0.12 - x ) = x^2
1.2 * 10^-5 - 1.0×10^−4x = x^2
x^2 + 1.0×10^−4x - 1.2 * 10^-5 = 0
x =0.0034 M
[H3O+] = 0.0034 M
Again; [H3O+] = [HA^-] = 0.0034 M
HA^-(aq) + H20(l) -------> A^-(aq) + H3O^+
I 0.0034 0 0
C -x + x +x
E 0.0034 - x x x
Ka2= [A^-] [H3O^+]/[HA^-]
5.0×10^−5 = x^2/ 0.0034 - x
5.0×10^−5 (0.0034 - x ) = x^2
1.7 * 10^-7 - 5.0×10^−5x = x^2
x^2 + 5.0×10^−5x - 1.7 * 10^-7 = 0
x=0.00039 M
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In what type of bonds do atoms join together because their opposite charges attract each other?
O metallic bonds and ionic bonds
O metallic bonds and covalent bonds
O ionic bonds and hydrogen bonds
O ionic bonds and covalent bonds
I am guessing ionic and hydrogen bonds (C), but can someone confirm? Thanks!
[tex]\leadsto[/tex] In what type of bonds do atoms join together because their opposite charges attract each other?
O metallic bonds and ionic bonds
O metallic bonds and covalent bonds
● Ionic bonds and hydrogen bonds ✓
O ionic bonds and covalent bonds
Explanation:During bonding, the metals tend to lose electrons while the non-metals gain electrons. These ions with opposite charges will attract one another, creating an ionic bond. Similarly, for hydrogen, it is a weak bond that occurs due to the electrostatic attraction between a proton in one molecule and an electronegative atom in the other.
The type of bond in which atoms join together because their opposite charges attract each other is ionic bonds and hydrogen bonds. The correct option is C.
What are ionic and hydrogen bonds?Ionic bonds are those bonds that are formed by the difference in the electrostatic charge between the molecules. Ex; sodium chloride.
Hydrogen bonds are formed between the hydrogen atom and the atom that are more electronegative than hydrogen.
Metals typically lose electrons during bonding, whereas non-metals typically gain electrons. These ions will be drawn to one another by their opposing charges, forming an ionic connection.
Similar to this, the electrostatic attraction between a proton in one molecule and an electronegative atom in the other results in a weak link for hydrogen.
Thus, the correct option is C, ionic bonds, and hydrogen bonds.
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Why does it take a larger partial pressure difference for oxygen to dissolve in plasma vs. carbon dioxide?
It take a larger partial pressure difference for oxygen to dissolve in plasma vs carbon dioxide because of its much higher solubility in plasma.
What is Partial Pressure ?Partial pressure is defined as the pressure of anyone gas that arises in the container with more than one gas and each gas exert pressure. Partial pressure is calculated only for gases which is exist in the same volume.
Why does it take larger partial pressure for oxygen dissolve in plasma ?Oxygen dissolve in plasma because oxygen exerts a certain amount of partial pressure. Plasma cannot carry much oxygen because of its solubility.
Thus from the above conclusion we can say that It take a larger partial pressure difference for oxygen to dissolve in plasma vs carbon dioxide because of its much higher solubility in plasma.
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Which best explains why the trend in noble gas boiling points increases down the group?.
The atoms become larger, the intermolecular forces between the atoms become stronger and more energy is needed to overcome these forces. Hence, the boiling point of noble gases increases down the group.
What are noble gases?
Group 18 of the modern periodic table consists of noble gases. Helium, neon, argon, krypton, xenon, and radon are noble gases. These gases are monoatomic and chemically inert under normal conditions and because of this they are also called inert gases. These gases are present in very small quantities in the atmosphere, and so they are also called rare gases.Trends in Physical Properties of Noble Gases:
Atomic Radii (Atomic size): As we move down the group from helium to radon the atomic size of Noble Gasses keeps on increasing. This is because when going down the group, the number of occupied shells with valence electrons increases.Boiling and Melting Points: As we move down the group, the boiling and melting point of the Noble Gasses increases due to the following reason:When moving down in the group, the atomic radius increases which results in the formation of a strong Van Der Waals force of attraction between the atoms.As to overcome the interatomic force of attraction which becomes stronger, it also requires more energy during melting and boiling.Density: All elements of group 18 have low densities. When going down the group, density increases as the atomic mass keeps on increasing.Ionization Energy: In the periodic table, As we move down the group the first ionization energy keeps on decreasing.Ionization Potential: When going down the group, the atomic radii increases which increases the attractive force and ultimately results in the increase of polarity and decrease in the ionization potential. This is because the larger atom of the group in the valence electrons are held together less tightly by the atom as they are situated far away from the nucleus.To learn more about trends in noble gases:
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The nuclear reactor in Japan had an accident in 2011 when it was hit by an earthquake. The reactor exploded and released a great deal of damaging radiation. Where did the energy for the explosion come from?
A. The nucleus of an atom.
B. The nucleus of a cell.
C. The radiation waves.
D. The radiation particles.
The nuclear reactor in Japan had an accident in 2011 when it was hit by an earthquake. The reactor exploded and released a great deal of damaging radiation. The energy for the explosion comes from option(a) i.e, The nucleus of an atom.
An explosion is a sudden increase in volume accompanied by a very strong energy release that usually results in the production of high temperatures and the release of high-pressure gases. High explosive detonations produce supersonic explosions that move through shock waves.
The 2011 Tohoku earthquake and tsunami, which occurred on March 11, 2011, and was the most violent earthquake ever recorded in Japan, were the direct causes of the nuclear tragedy. The nuclear power facility was damaged by the strong tsunami that the earthquake caused, which had waves that were 13 to 14 meters high.
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