Answer:doesn't one more. chlorine. one fewer. hydrogen
Explanation:
Jon's equation does support his claim that matter is conserved during the chemical reaction because the reactants contain the same number of atoms compared to the products.
In a balanced chemical equation, the total number of atoms of each element in the reactants must be equal to the total number of atoms of the same element in the products.
This is known as the law of conservation of mass, which states that matter cannot be created or destroyed during a chemical reaction.
As long as the equation is balanced, showing the same number of atoms on both sides, it confirms that matter is conserved throughout the reaction, supporting Jon's claim.
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The equilibrium constant for the following equation:
PCl5(g) <--> PCl3(g) + Cl2(g) is 1.05 at 250 degrees Celsius. If the equilibrium partial pressures of PCl5 and PCl3 are 0.875 atm and 0.463 atm respectively, what is the equilibrium partial pressure of Cl2?
Group of answer choices
A. 1.05 atm
B. 1.98 atm
C. 0.463 atm
D. 0.054 atm
From the calculation, the partial pressure of Cl2 is 1.98 atm. Option B
What is the equilibrium constant?The term equilibrium constant refers to the value that shows us the extent to which reactants are converted into products. We know that the equilibrium constant can only be obtained by the use of the equilibrium partial pressures of each of the species.
Thus we have;
K = p PCl3 . pCl2/pPCl5
p PCl3 = partial pressure of PCl3
pCl2 = partial pressure of Cl2
pPCl5 = partial pressure of PCl5
K = equilibrium constant
Substituting values;
1.05 = 0.463 * pCl2/0.875
pCl2 = 1.05 * 0.875/0.463
pCl2 = 1.98 atm
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12.2 g of N₂ gas at 1132 torr and 91°C has a volume of
Answer:
8.73 L
Explanation:
First, you need to convert grams to moles using the molar mass.
Molar Mass (N₂): 2(14.009 g/mol)
Molar Mass (N₂): 28.018 g/mol
12.2 grams N₂ 1 mole
---------------------- x ------------------------ = 0.435 moles N₂
28.018 grams
To find the volume, you need to use the Ideal Gas Law:
PV = nRT
In this equation,
-----> P = pressure (torr)
-----> V = volume (L)
-----> n = moles
-----> R = Ideal Gas constant (62.36 torr*L/mol*K)
-----> T = temperature (K)
After converting the temperature from Celsius to Kelvin, you can plug the given values into the equation.
P = 1132 torr R = 62.36 torr*L/mol*K
V = ? L T = 91 °C + 273.15 = 364.15 K
n = 0.435 moles
PV = nRT
(1132 torr)V = (0.435 moles)(62.36 torr*L/mol*K)(364.15 K)
(1132 torr)V = 9888.015
V = 8.73 L
If you do a lab that burns Magnesium in pure Oxygen what would the empirical formula of the compound be if you started with 0.6 g Magnesium and 0.4 g of Oxygen?
Group of answer choices
A. Mg2O2
B. Mg2O3
C. Mg3O2
D. MgO
Answer:
Empirical Formula = MgO
Kindly award branliest
Explanation:
Elements = Mg O
Mass/ 0.6g/ 0.4g/
RAM 24 16
= 0.025 0.025
Divide by
the smallest = 0.025/ 0.025/
value. 0.025 0.025
Mole ratio = 1 : 1
Empirical Formula = MgO
What if there was an inverse relationship between the temperature and the volume? How do you think the world might be different? How would this change our day-to-day lives?
If there was an inverse relationship between the temperature and the volume, our daily lives change because in high temperature things will contract.
What if there was an inverse relationship between the temperature and the volume?If there was an inverse relationship between the temperature and the volume then with increasing temperature decrease occur in the volume of a substance. If this type of relationship is present in the world, the objects will contract when the temperature is high and expand when the temperature is low which make the solid materials expand at winter and contract at summer season.
So we can conclude that if there was an inverse relationship between the temperature and the volume, our daily lives change because in high temperature things will contract.
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The _____ is the attraction of the electrons of one atom to the protons of the other atom, leading to a bond.
a. oxidation reaction
b.electron orbital
c.gravitational pull
d.electrostatic force
Answer:
d
Explanation:
The + charge of the proton and the - charge of the electron create a electrostic force of attraction ( opposites attract)
Which of the following is NOT an example of a colligative property?
Group of answer choices
A. Salt is added to ice to make homemade ice cream.
B. Salt is added to roads before a snow storm.
C. Antifreeze is added to a radiator of a car.
D. Salt water dehydrates someone that drinks it.
D. The option that is NOT an example of a colligative property is salt water dehydrates someone that drinks it.
What is colligative property?
Colligative properties are the physical changes that result from adding solute to a solvent.
Colligative Properties depend on how many solute particles are present as well as the solvent amount, but they do NOT depend on the type of solute particles, although do depend on the type of solvent.
One important thing to note is that colligative property is going to change the melting point or the boiling point of a substance.
Thus, the option that is NOT an example of a colligative property is salt water dehydrates someone that drinks it.
The correct option is D.
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State whether the following liquids are miscible with water (H2O) by entering "yes" or "no".
1) Benzene, C6H6
2) Methanol, CH3OH
3) Chloroform, CHCl3
To answer this question, you may need access to the periodic table of elements.
How many bonding electrons are in the Lewis structure of NH₃?
a.) 6
b.) 2
c.) 5
d.) 4
Answer:
6 bonding electrons are needed.
Once balanced, what is the coefficient of HCl in the following reaction:
Mg + HCl → MgCl2 + H2
Group of answer choices
A. 1
B. 2
C. 0
D. 3
Once balanced, the coefficient of HCl in the following reaction: Mg + HCl → MgCl2 + H2 is 2 (option B).
How is a chemical reaction balanced?A chemical reaction is said to be balanced when the number of moles of each atom of an element on both sides of the equation is the same.
According to this question, magnesium reacts with hydrochloric acid to form magnesium chloride and hydrogen gas as follows:
Mg + HCl → MgCl2 + H2
However, to balance the equation, we make use of coefficients, which are numbers placed in front of a compound to make the number of moles of atoms equal.
The balanced equation is as follows:
Mg + 2HCl → MgCl2 + H2
Therefore, once balanced, the coefficient of HCl in the following reaction: Mg + HCl → MgCl2 + H2 is 2.
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What is the frequency of
an electron with a wavelength
of 225 nm?
Answer:
1.33 x 10¹⁵ Hz
Explanation:
You can find the frequency using the following equation:
f = c / λ
In this equation,
-----> f = frequency (Hz)
-----> c = speed of light (3.0 x 10⁸ m/s)
-----> λ = wavelength (m)
Before we can plug the values into the equation, we need to convert the wavelength from nm to m.
225 nm 1 m
---------------- x -------------------- = 2.25 x 10⁻⁷ m
1 x 10⁹ nm
f = c / λ
f = (3.0 x 10⁸ m/s) / (2.25 x 10⁻⁷ m)
f = 1.33 x 10¹⁵ Hz
The frequency of a wave can be calculated using the wavelength and and speed of light. The frequency of a wave with 225 nm is 1.33 × 10¹⁵ Hz.
What is frequency ?Frequency of a wave is the number of wave cycles per second. It mathematically taken as the inverse of time taken to travel and it have a unit of s⁻¹ other than Hz.
The wavelength of an electromagnetic wave is the distance between two consecutive crests or troughs.Wavelength and frequency are in inverse relationship. For a longer wavelength the frequency will be lower.
Higher frequency waves are more energetic than longer wavelengths. Thus energy and frequency are in direct proportion
It is given that the wavelength of the electron is 225 nm. Consider the electron behaving as wave and the frequency v can be calculated using the speed of light c as follows:
[tex]v = C/\lambda[/tex]
= (3 ×10⁸ m/s) /(225 ×⁻⁹ m)
= 1.33 × 10¹⁵ Hz.
Hence, the frequency of an electron with a wavelength of 225 nm is 1.33 × 10¹⁵ Hz.
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For the reaction: 3 H2(g) + N2(g) <--> 2 NH3(g), the concentrations at equilbrium were [H2] = 0.10 M, [N2] = 0.10 M, and [NH3] = 5.6 M. What is the equilibrium constant (K)?
Group of answer choices
A. K = 3.1 x 105
B. K = 560
C. K = 5.6 x 10-4
D. K = 1.8 x 10-3
The equilibrium constant, k of the reaction in which case, the concentrations of the given reactants and products are as indicated is; Choice A; K = 3.1 x 10⁵
What is the equilibrium constant , k of the reaction as described in the task content?It follows from above that the concentrations of the reactants and products are as follows; [H2] = 0.10 M, [N2] = 0.10 M, and [NH3] = 5.6 M at equilibrium.
Hence, the equilibrium constant of the reaction in discuss is;
K = [5.6]²/[0.10]³[0.10]
k = 5.6² × 10⁴
k = 3.136 × 10⁵
K = 3.1 × 10⁵.
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What is included in the study of chemistry?
Select one:
a.
composition and interaction of matter
b.
motion and forces
c.
the economics of manufacturing
d.
forces and technology
Explanation:
composition and interaction of matter included in the study of chemestry
The pressure on 20 mL of a gas at constant temperature is changed from 4.0 atm to 2.0 atm. What is the new volume?
Answer:
40 ml
Explanation:
boyles law
Pi Vi = PƒVƒ
4 * 20 = 2 * Vƒ
40 ml = Vƒ
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If the pressure of 1.5 moles of a gas is 2 atm and the temperature is 27°C, what is the volume of the gas?
Group of answer choices
A. 9.25 L
B. 5.0 L
C. 37.0 L
D. 18.5 L
Answer:
9.25l
Explanation:
9.25l was correct answer
The ideal gas law is a fundamental equation that describes the behavior of an ideal gas. It relates the pressure (P), volume (V), temperature (T), and number of moles (n) of an ideal gas using the ideal gas constant (R). The volume of the gas is 18.5 L. Hence option D is correct.
We can use the ideal gas law to solve this problem:
PV = nRT
where:
P is the pressure of the gas (in atm)
V is the volume of the gas (in L)
n is the number of moles of the gas
R is the ideal gas constant (0.08206 L·atm/mol·K)
T is the temperature of the gas (in K)
Plugging in the values from the problem, we get:
2 atm * V = 1.5 mol * 0.08206 L·atm/mol·K * 300 K
V = (1.5 mol * 0.08206 L·atm/mol·K * 300 K) / 2 atm
V = 18.5 L
Therefore, the volume of the gas is 18.5 (option D).
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For each balanced reaction, indicate the total number of atoms in the table below.
(i) Make ammonia number of atoms on reactant side is 8 and on product side is 8. (ii) Separate water number of atoms on reactant side is 6 and on product side is 6. (iii) Combust methane number of atoms on reactant side is 9 and number of atoms on product side is 9.
What is Balanced Chemical Equation ?The balanced chemical equation is the equation in which the number of atoms on the reactant side is equal to the number of atoms on the product side in an equation.
(i) Make Ammonia
First we have to write the balanced chemical equation
N₂ + 3H₂ → 2NH₃
Reactant side Product side
N = 2 N = 2
H = 6 H = 6
So total number of atoms on product and reactant side is 8.
(ii) Separate Water
First we have to write the balanced chemical equation
2H₂O → 2H₂ + O₂
Reactant side Product side
H = 4 H = 4
O = 2 O = 2
So total number of atoms on product and reactant side is 6.
(iii) Combust methane
First we have to write the balanced chemical equation
CH₄ + 2O₂ → 2H₂O + CO₂
Reactant side Product side
C = 1 C = 1
H = 4 H = 4
O = 4 O = 4
So total number of atoms on product and reactant side is 9.
Thus from the above conclusion we can say that For each balanced reaction, the total number of atoms are
Reaction Total number of atoms
Reactant side Product side
Make Ammonia 8 8
Separate Water 6 6
Combust Methane 9 9
Disclaimer: The question was given incomplete on the portal. Here is the complete question.
Question: For each balanced reaction, indicate the total number of atoms in the table below.
Reaction Total number of atoms
Reactant side Product side
Make Ammonia _________ __________
Separate Water _________ __________
Combust Methane _________ __________
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The equilibrium constant for the following reaction:
Ca(HCO3)2(s) <--> CaO(s) + 2 CO2(g) + H2O(g)
would be:
Group of answer choices
A. K = [Ca(HCO3)2] / [CaO][CO2]2[H2O]
B. K = [CaO][CO2]2[H2O] / [Ca(HCO3)2]
C. K = [CO2]2[H2O]
D. K = [CO2]2[H2O] / [Ca(HCO3)2]
Answer:
C.) [tex]K = {[CO_{2} ]^{2} [H_2O] }[/tex]
Explanation:
The general equilibrium expression looks like this:
[tex]K = \frac{[B]^b[C]^{c} [D]^{d} }{[A]^{a}} }[/tex]
In this expression,
-----> K = equilibrium constant
-----> uppercase letters = formulas
-----> lowercase letters = balanced equation coefficients
Solids are not included in the expression, so Ca(HCO₃)₂(s) and CaO(s) should be left out. The products should be in the numerator and the reactants are in the denominator. This makes the expression:
[tex]K = \frac{[B]^b[C]^{c} [D]^{d} }{[A]^{a}} }[/tex] <----- Equilibrium expression
[tex]K = {[CO_{2} ]^{c} [H_2O]^{d} }[/tex] <----- Insert gaseous formulas
[tex]K = {[CO_{2} ]^{2} [H_2O] }[/tex] <----- Insert coefficients
10. What are saturated and unsaturated fatty acids?
Fatty acids are the building blocks of the fat in our bodies and in the food we eat.
Functionality of fatty acids?Saturated fatty acids consists of single bond of carbon atoms and no double bondSaturated fatty acids are solids in room temperature.Only single bond of hydrocarbon chain is found.Melting point is high and have straight chainIt is soluble in vitamins and obtained from palm oil, coconut oil, and animal fats.Unsaturated fatty acids consists of carbon atoms and there will be one or more double bondsSaturated fatty acids consists of single bond of carbon atoms and no double bond is found. are liquids in room temperature.One or more bond of hydrocarbon chain.Melting point is low and have bend chains at double points.It is insoluble in vitamins and obtained from sunflower oil,walnut,fish oil.To learn more about fatty acids, refer :
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Hydrochloric Acid would best be described as a:
Group of answer choices
A. Arrhenius, BrØnsted-Lowrey and Lewis Base
B. Arrhenius, BrØnsted-Lowrey and Lewis Acid
C. BrØnsted-Lowrey and Lewis Acid
D. Arrhenius and Lewis Acid
Hydrochloric acid would best be described as a Arrhenius acid, Lewis acid and Brønsted-Lowry acid (option B).
What is Arrhenius, Brønsted-Lowry acid?Arrhenius acid is any substance that dissociates in an aqueous solution to form hydrogen ions (H+) or proton.
On the other hand, a Brønsted-Lowry acid is any substance that can donate a proton or hydrogen ion to another substance.
Hydrochloric acid (HCl) can be categorized as an Arrhenius acid and Brønsted-Lowry acid because it has the ability to donate H+ and increase the hydrogen ion concentration of an aqueous solution.
Also, Lewis cids are the chemical substances that are able to accept electron pairs.
Therefore, Hydrochloric acid would best be described as a Arrhenius acid, Lewis acid and Brønsted-Lowry acid.
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if .709 j of heat is added to water and cause the temperature to go up by .036 degrees C what mass of water is present
Answer:
0.00471 grams H₂O
Explanation:
To determine the mass, you need to use the following equation:
Q = mcΔT
In this equation,
-----> Q = energy/heat (J)
-----> m = mass (g)
-----> c = specific heat capacity (J/g°C)
-----> ΔT = temperature change (°C)
The specific heat capacity of water is 4182 J/g°C. You can plug the given values into the equation and simplify to isolate "c".
Q = 0.709 J c = 4182 J/g°C
m = ? g ΔT = 0.036 °C
Q = mcΔT <----- Equation
0.709 J = m(4182 J/g°C)(0.036 °C) <----- Insert values
0.709 J = m(150.552) <----- Multiply 4182 and 0.036
0.00471 = m <----- Divide both sides by 150.552
10 Points
The International Commission of Radiological Protection has set the limit for yearly radiation exposure at 1000 uSv. What is the risk
associated with this dose?
A. No risk at this limit or below.
OB. 1/2400 chance of cancer over a 40 year period.
OC. 1/1000 chance of cancer over a 40 year period.
OD. 1/100,000 chance of cancer over a 40 year period.
The maximum allowable annual dose of radiation has been set at 1000 uSv by the worldwide commission on radiological protection. At this threshold or lower, there is no risk.
What is S(sievert)?
The sievert, a measurement used to measure radiation, is used to calculate how much radiation is taken in by human tissues.1000 millisieverts are equal to one sievert (mSv) [ 1 Sv= 1000 mSv]. There are 1,000 microsieverts in a millisievert[ 1 mSv = 1000 uSv]Here are some details concerning the risks increasing radiation levels cause to our health:
Yukio Edano, Japan's Chief Cabinet Secretary, had said that radiation levels near the damaged facility on the northeast coast may rise to 400 millisieverts (mSv) per hour.The lowest dose of exposure that causes any rise in cancer probability is readily visible is 100 mSv per year. Five out of every 100 people exposed to a cumulative 1,000 mSv (1 sievert) may likely get a deadly malignancy several years later.The central nervous system, as well as the red and white blood cells, are destroyed by high radiation doses or acute radiation exposure. This impairs the immune system, making it difficult for the sufferer to fight off diseases.One sievert (1,000 mSv), for instance, only results in radiation sickness, which includes nausea, vomiting, and bleeding, but not death. About half of individuals exposed to a single dose of 5 sieverts would perish within a month.Therefore the correct choice is an option (A).
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Answer:
Answer D
Explanation:from founders Edtell :
A dose of 1000 uSv is believed to carry a 1/100,000 risk of getting cancer over 40 years due to your exposure to radiation. The average dose is around 2400 uSv.
An oven-cleaning solution is 40.0% (by mass) NaOH.
If one jar of this product contains 458 g of solution, how much NaOH (by mass) does it contain?
The amount of NaOH by mass the jar contains will be 183.2 g
Percent compositionThe percent by mass of NaOH in the oven-cleaning solution is 40.0%.
This means that for every 100 g of the cleaning solution, there would be 40 g of NaOH.
Now, the jar in question contains 458 g of this solution which is 40.0% NaOH by mass.
The amount of NaOH in the jar can be calculated as:
40/100 x 458 = 183.2 g
This means that 458 g of the oven-cleaning solution that is present in the jar contains 183.2 g of NaOH.
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Once balanced, what is the coefficient of HCl in the following reaction:
Mg + HCl → MgCl2 + H2
Group of answer choices
A. 1
B. 2
C. 0
D. 3
Answer:
B. 2
I hope this helps.
Explanation:
Mg + 2HCl → MgCl2 + H2
Perform the following opeartiona dn express the answer in scientific notation 3.14x10^-2/2.65x10^-7
Answer:
1.18 x 10⁵
Explanation:
3.14 x 10⁻² / 2.65 x 10⁻⁷ = 1.18 x 10⁵
When performing division, the final answer should have the same number of significant figures as the number with the smallest number of sig figs. In this case, both of the given numbers have 3 sig figs, meaning the final answer should have this many as well.
Predict the products and write a word equation and a balanced chemical reaction
equation for when aqueous lithium sulfate reacts with aqueous calcium iodide.
Answer:
1.) aqueous lithium sulfate + aqueous calcium iodide ---> aqueous lithium iodide + solid calcium sulfate
2.) Li₂SO₄ (aq) + CaI₂ (aq) ------> 2 LiI (aq) + CaSO₄ (s)
Explanation:
This appears to be a double-displacement reaction. In these reactions, the cation of one compound swaps with the cation of another.
Therefore, lithium swaps with calcium. The new products are lithium iodide (LiI) and calcium sulfate (CaSO₄). Lithium iodide is soluble in water, whereas calcium sulfate is generally not.
The word equation (including the states of matter):
aqueous lithium sulfate + aqueous calcium iodide ---> aqueous lithium iodide + solid calcium sulfate
An equation is balanced when there is an equal amount of each element on both sides of a reaction. If these amounts are unequal, you can add coefficients to modify the quantities of particular molecules.
The unbalanced equation:
Li₂SO₄ (aq) + CaI₂ (aq) ------> LiI (aq) + CaSO₄ (s)
Reactants: 2 lithium, 1 sulfur, 4 oxygen, 1 calcium, 2 iodine
Products: 1 lithium, 1 sulfur, 4 oxygen, 1 calcium, 1 iodine
The balanced equation:
Li₂SO₄ (aq) + CaI₂ (aq) ------> 2 LiI (aq) + CaSO₄ (s)
Reactants: 2 lithium, 1 sulfur, 4 oxygen, 1 calcium, 2 iodine
Products: 2 lithium, 1 sulfur, 4 oxygen, 1 calcium, 2 iodine
What is the name of an isotope having 29 protons and 23 neutrons? Write the elemental symbol and mass number of this isotope.
Answer:
copper - 52 (or Cu - 52)
⁵²Cu
Explanation:
Isotopes are different atoms of the same element that differ in the number of neutrons. Therefore, you can determine which element this is by examining the number of protons. All atoms with 29 protons are copper (Cu).
The mass number is the total number of protons and neutrons in an atom. Therefore, the mass number of this isotope is 52 (29 + 23 = 53). When writing an elemental symbol, the mass number is found on the top left.
As such, the name of this isotope is copper - 52 (or Cu - 52) and the symbol is ⁵²Cu.
Which of the following elements has the largest atomic radius?
Group of answer choices
A. Iron
B. Cobalt
C. Chromium
D. Calcium
The answer is calcium.
Calcium has the largest atomic radius.
Is HF the most polar among covalent bonds?
Answer:
No.
Explanation:
HI is more polar than HF
A 24.5 mL sample of a 0.376 M aqueous hypochlorous acid solution is titrated with a 0.487 M aqueous potassium hydroxide solution. What is the pH at the start of the titration, before any potassium hydroxide has been added?
The pH of the solution when no base is added is 0.424.
An aqueous solution's acidity or basicity can be determined using the pH scale. The pH values of acidic solutions are typically lower than those of basic or alkaline solutions.
The chemical formula of hypochlorous acid is HClO.
1 mole of HClO produces 1 mole of hydrogen ions and 1 mole of fluoride ions.
KOH (aq) + HClO (aq) → KClO (l) + H2O (l)
To calculate the pH of the solution when no base is added, we use the equation:
[tex]p_{H} = - log {H}^{+}[/tex]
We are given:
[tex]H^{+} = 0.376 M[/tex]
Putting values in the above equation, we get:
[tex]p_{H} = - log (0.376)[/tex]
[tex]p_{H}[/tex] = 0.424
Hence, the pH of the solution when no base is added is 0.424
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If a chemical is oxidized it is also known as the
Group of answer choices
A. the one that is reduced
B. the product
C. oxidizing agent
D. reducing agent
Answer:
D.) reducing agent
Explanation:
Oxidized chemicals gain electrons. In order to gain these electrons, another chemical must lose electrons. So, the chemical (which will be oxidized) acts as a reducing agent, causing the other chemical to be reduced and lose electrons.
How many grams of oxygen gas are needed to react completely with 28.442 grams of sulfur dioxide gas ?
Answer:
SO2(g) + O2(g) SO3(g) (needs to be balanced. Balance it by placing a 1/2 in front of the 02.) This is a 5-sig-fig problem, so when you calculate your molar masses, you must use all of the sig figs available to you from the periodic table. That's how you can get this problem correct. Melissa Maribel likes to round the numbers from the periodic table, and usually that is ok. But for problems where you have many sig figs, your molar masses from the periodic table must have at least as many sig figs as your data. Therefore, for each oxygen atom, please use 15.9994 g/mol. For each sulfur atom, please use 32.066 g/mol. Thank you.
Answer:
7.1029 gms of O2
Explanation:
First balance the equation to get
2 SO2 + O2 ====> 2 SO3
Mole weight of sulfur dioxide gas
S + 2 O == 32.066 + 2 * 15.999 = 64.064 gm/mole ( 5 signif digits)
28.442 gm / 64.064 gm/mole = .44396 mole of SO2 ( 5 sig digits)
From the balanced equation, you can see you need 1/2 as many moles of O2 as SO2:
mole weight of O2 = 2 * 15.999 = 31.998 gm / mole ( 5 sig digits)
now you need 1/2 of .44396 moles of this
1/2 * .44396 * 31.998 = 7.1029 gm ( 5 sig digits)