Ksp(the solubility product constant) = [Cu⁺] [I⁻]
So, the Ksp for Cui would be:
Ksp = (2.26 × 10⁻⁶) (2.26 × 10⁻⁶) = 5.11 x 10⁻¹²
Formula used:
K = [tex]K_{sp} = [A^+]^a [B^-]^b[/tex], where
Ksp = solubility product constant
A⁺ = cation in an aquious solution
B⁻ = anion in an aqueous solution
a, b = relative concentrations of a and b
DefinitionThe equilibrium constant for a solid material dissolving in an aqueous solution is the SOLUBILITY PRODUCT CONSTANT, Ksp. It stands for the degree of solute dissolution in solution. A substance's Ksp value increases with how soluble it is.
Take into account the general dissolving response (in aqueous solutions) below:
aA(s)⇔cC(aq)+dD(aq)
The molarities or concentrations of the products (cC and dD) must be multiplied in order to find the Ksp. Any product that has a coefficient in front of it must be raised to the power of that coefficient (and also multiply the concentration by that coefficient).
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Certain drugs, such as ssris, block the reuptake of a neurotransmitter into the presynaptic cell. what effect does this have onsynaptic communication?
Selective serotonin reuptake inhibitors (SSRIs) are drugs that are antidepressants. These blocks the reuptake of a neurotransmitter leading to increases in their activity in the synaptic cells.
What are neurotransmitters?Neurotransmitters are defined as the signaling molecules that are secreted by the nerve cells and act as signal transporter between the neurons and the other cells of the body.
The SSRIs class of drugs affects this neurotransmitter and blocks the pathway to the presynaptic cell. This, in turn, affects synaptic communication by increasing the amount of those SSRIs in the body and acting as a stimulant to treat various diseases.
Therefore, the SSRIs block the neurotransmitter and result in their effects.
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10 mL of 2(M) NaOH solution is added to 200 mL of 0.5 (M) of NaOH solution. What is the final concentration?
Hello its me Sanya yadav
Which spectroscopic tool would be best for distinguishing a sample of 1,2-dichloropropane from 1,2-dibromopropane?
The NMR spectroscopy will be used for distinguishing a sample of 1,2-dichloropropane from 1,2-dibromopropane.
A spectroscopic method for observing the local magnetic fields surrounding atomic nuclei seems to be nuclear magnetic resonance spectroscopy, also referred to as magnetic resonance spectroscopy as well as NMR spectroscopy.
The identification and study of organic molecules benefit greatly from nuclear magnetic resonance (NMR) spectroscopy. This type of spectroscopy has a straightforward underlying theory. Numerous atom types' nuclei behave like small magnets and frequently align themselves in magnetic fields.
Therefore, the NMR spectroscopy will be used for distinguishing a sample of 1,2-dichloropropane from 1,2-dibromopropane.
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C4h5n(aq) h2o(l)⇌c4h5nh (aq) oh−(aq) express your answers as chemical formulas. enter your answers in the order given in the question separated by commas
In aqueous solutions, the hydrogen ion, also known as the hydronium ion, is a Bronsted-Lowry acid, while the hydroxide ion is a base as a result of the self-dissociation reaction.
[tex]C_4H_5N(aq) + H_2O(l)[/tex] ⇄ [tex]C_4H_5NH (aq) + OH^-(aq)[/tex]
[tex]Bronsted-\\Lowry Acid[/tex] [tex]Conjugate Acid[/tex]
Brønsted–Lowry acid-base theory:Any species that may transfer a proton (H+) to another molecule is a Brnsted-Lowry acid. Any species that can take a proton from another molecule is a Brnsted-Lowry base. In essence, a Brnsted-Lowry base is a proton acceptor (PA) and an acid is a proton donor (PD).
According to the Arrhenius theory, acids are defined as chemicals that dissociate in an aqueous solution to produce hydrogen ions (H+), whereas bases are defined as substances that produce OH (hydroxide ions).
The hydrogen ion, or hydronium ion, is a Brønsted–Lowry acid in aqueous solutions, and the hydroxide ion is a base, by virtue of the self-dissociation reaction.
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An analytical chemist has determined by measurements that there are 8. 5 moles of magnesium in a sample of talc. how many moles of hydrogen are in the sample?
The moles of hydrogen in the talc sample are 5.67 moles.
Talc are the hydrous silicate minerals. The chemical formula of talc is Mg₃Si₄O₁₀(OH)₂.
From the formula it can be determined that there are: 3 moles of Mg, 4 moles of Si, 12 moles of O and 2 moles of H.
Moles are a type of SI unit of measurement of the amount of substance.
According to the question, magnesium = 8.5 moles
Also, 3 moles of Mg = 2 moles of H
Therefore, moles of H = 8.5 moles × (2 moles H / 3 moles Mg)
moles of H = 5.67 moles
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Calculate the number of atps generated by completely oxidizing one molecule of tripalmitoylglycerol into co2 and h2o ?
The number of atps generated is 330 ATP
What is atps?
At the cellular level, energy is used and stored as adenosine triphosphate (ATP). Adenine, ribose, and three serially bound phosphate groups make up the structure of ATP, which is a nucleoside triphosphate.
Glycerol provided us with 2 ATP and 2 NADH. In b-oxidation, we obtained 8 NADH and 8 FADH from each fatty acid, but since there were 3 fatty acids, we also produced 24 NADH and 24 FADH. We used 24 acetyl-CoA molecules, which were converted into 24 ATP, 24 FADH, and 72 NADH molecules by the citric acid cycle. You should obtain the same figures after adding everything up.
80 NADH x 3 ATP/NADH = 240 ATP
32 FADH x 2 ATP/FADH = 64 ATP
102 + 64 + 26 ATP = 330 ATP.
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Prove the following:V=U + AT
We know that,
acceleration (a) = final velocity(V)-initial velocity(U)/ Time taken(T)
In a 45 minute road trip a vehicle emitted 16. 7 g of nitrogen dioxide (NO2) from its exhaust. What is the mass of nitrogen atoms in this amount of NO2?
When a 45-minute road trip a vehicle emitted 16.7 g of nitrogen dioxide (NO₂) from its exhaust then the mass of nitrogen atoms in this amount of NO₂ would be 5.082 grams.
What is a Chemical compound?The chemical compound is a combination of two or more either similar or dissimilar chemical elements.
for example, H₂O is a chemical compound made up of two oxygen atoms and a single hydrogen atom
The molecular mass of any compound is calculated by the sum of the mass of the individual atom
As given in the problem In a 45-minute road trip a vehicle emitted 16.7 g of nitrogen dioxide (NO₂) from its exhaust
The molecular mass of the NO₂ is the sum of the mass of the nitrogen atom and the oxygen atom.
The mass of the single nitrogen atom is 14, while the mass of the single oxygen atom is 16
the molecular mass of NO₂= mass of the N atom+2×(mass of O atom)
= 14 + 2×16
=46
As 46 grams of NO₂ contain 14 grams of Nitrogen
then 1 gram of NO₂ would contain 14/46 grams of Nitrogen
then 16.7 grams of NO₂ would contain (14/46×16.7) grams of Nitrogen
The mass of a nitrogen atom in 16.7 grams of NO₂ would be 5.082 grams
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What is the molality of phosphoric acid, h3po4, in a solution prepared from 376 g of phosphoric acid and 1. 70×103 g of ethylene glycol, c2h4(oh)2?
The molality of phosphoric acid, h3po4, in a solution prepared from 376 g of phosphoric acid and 1. 70×103 g of ethylene glycol, c2h4(oh)2 is 2.25m.
Ethylene Glycol is known as C2H4 (OH)2.
It is used to prepare Antifreeze solution by adding water in it.
Given,
Mass of phosphoric acid = 376g
Mass of ethylene acid = 1.7 × 10 3g
Since ethylene glycol is in excess. So it is acts as a solvent and phosphoric acid acts as solute
As we know that,
Molar mass of phosphoric acid = 98g
Moles of phosphoric acid
= Given mass / Molar mass
=376 / 98
= 3.83
Molality is defined as the ratio of moles of solute to the mass of solvent.
Molality = Moles of solute / Mass of solvent
= 3.83 / 1.7 kg
= 2.25m.
Thus, we found that the molality of phosphoric acid is 2.25m.
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Aspirin is the common name for acetyl salicylic acid, C9H8O4. One tablet contains 0. 325 g of aspirin. How many moles of aspirin is this?
Answer:
.0017952905 mol
Explanation:
I hope this helps, I can't promise I got it right, please let me know haha!
When cyclohexene is subjected to mercuration in methanol and the resulting mixture is reduced with sodium borohydride, the major organic product is ________.
The primary organic product is a 1:1 mixture of enantiomeric ethers when cyclohexene is subjected to mercuration in methanol and the resulting mixture is reduced with sodium borohydride. The correct option is B.
What is cyclohexene?Cyclohexene is a hydrocarbon with the formula C₆H₁₀ . It has no color and a pungent scent. It is a necessary element in a number of industrial processes. It is not a stable compound.
One butadiene will exist in the s trans form rather than the s-cis form because the energy of s trans is lower than that of s-cis trans.
Thus, the correct option is B) a 1:1 mixture of enantiomeric ethers.
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The question is incomplete. Your complete question is given below:
A) a meso ether.
B) a 1:1 mixture of enantiomeric ethers.
C) a meso diol.
D) a 1:1 mixture of enantiomeric diols.
E) methoxycyclohexane.
1) Calculate the empirical formula for a chemical compound that gives the following analysis: 66.6 g titanium and 33.4 g oxygen.
a) Ti_2O_3
b) Ti_2O
c) TiO_3
d) Ti_2
2) The empirical formula for a compound shows the symbols of the elements with subscripts indicating what?
a) actual numbers of atoms in a molecule
b) number of moles of the compound in 100 g
c) smallest whole-number ratio of the atoms
d) atomic masses of each element
3) In the tin oxide laboratory activity, what was the color of the vapor emitted when the nitric acid was added to the tin?
a) orange-brown
b) pink
c) green
d) blue
4) What is the empirical formula for a compound that is 36.6 percent potassium, 33.2 percent chlorine, and 29.9 percent oxygen?
KClO_2
KClO_3
K_2Cl_2O
K_2Cl_2O_5
5) What is the empirical formula for a compound that is 43.6 percent phosphorus and 56.4 percent oxygen?
P_3O_7
PO_3
P_2O_3
P_2O_5
1. The empirical formula of the compound is Ti₂O₃
2. The correct answer to the question is: smallest whole-number ratio of the atoms (Option C)
3. The correct answer to the question is: orange-brown (Option A)
4. The empirical formula of the compound is KClO₂
5. The empirical formula of the compound is P₂O₅
1. How to determine the empirical formulaTi = 66.6 gO = 33.4 gEmpirical formula =?Divide by their molar mass
Ti = 66.6 / 48 = 1.3875
O = 33.4 / 16 = 2.0875
Divide by the smallest
Ti = 1.3875 / 1.3875 = 1
O = 2.0875 / 1.3875 = 3/2
Multiply by 2 to express in whole number
Ti = 1 × 2 = 2
O = 3/2 × 2 = 3
Thus, the empirical formula of the compound is Ti₂O₃
2. What is empirical formula?This is the simplest formula of a compound which shows the smallest whole number ratio of the atoms present in the compound
With the above definition, we can conclude that the correct answer to the question is: smallest whole-number ratio of the atoms (Option C)
3. What colour is shown when nitric acid is added?In the tin oxide laboratory activity, the colour of the vapor emitted when nitric acid is added to the tin is: orange-brown
NOTE: This colour is visible when we carryout the practical experiment
Thus, the correct answer to the question is orange-brown (Option A)
4. How to determine the empirical formulaK = 36.6%Cl = 33.2%O = 29.9%Empirical formula =?Divide by their molar mass
K = 36.6 / 39 = 0.9385
Cl = 33.2 / 35.5 = 0.907
O = 29.9 / 16 = 1.8688
Divide by the smallest
K = 0.9385 / 0.907 = 1
Cl = 0.907 / 0.907 = 1
O = 1.8688 / 0.907 = 2
Thus, the empirical formula of the compound is KClO₂
5. How to determine the empirical formulaP = 43.6%O = 56.4%Empirical formula =?Divide by their molar mass
P = 43.6 / 31 = 1.406
O = 56.4 / 16 = 3.525
Divide by the smallest
P = 1.406 / 1.406 = 1
O = 3.525 / 1.406 = 5/2
Multiply by 2 to express in whole number
P = 1 × 2 = 2
O = 5/2 × 2 = 5
Thus, the empirical formula of the compound is P₂O₅
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Copper has a delta.hfus = 13.0 kj/mol. what mass of copper releases 112.4 kj of heat as it freezes? use q equals n delta h.. 9.42 g 6.75 g 549 g 1590 g
The mass of copper releases 112.4 kj of heat as it freezes is 549 gm.
What is heat of fusion?The most typical illustration is when solid ice transforms into liquid water. The molecules within in the substance become less structured as a result of this process, which is also known as melting or heat of fusion.
Calculation for mass of copper;
The heat of fusion for copper is given as 13.0 kj/mol.
Hfus(Cu) = 13.0 kJ/mol
The heat released during the process is 112.4 kj.
Q = 112.4 kJ;
The formula for molar heat of substance is;
Q = n(Cu) · Hfus(Cu).
Where n(Cu) is the number of moles of copper present in the solution.
Write formula in terms of Number of moles.
n(Cu) = Q / Hfus(Cu)
Substitute the given values;
n(Cu) = 112.4 kJ / 13.0 kJ/mol.
n(Cu) = 8.65 mol (number of moles of copper present)
m(Cu) = n(Cu) · M(Cu).
Where, m(Cu) is the mass of copper.
M(Cu) is the molecular mass of the copper.
Substitute the values in the formula to get the mass.
m(Cu) = 8.65 mol × 63.546 g/mol.
m(Cu) = 549.428 g
Therefore, the mass of copper present in the solution was 549.428 g.
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Answer: C.) 549 g
Explanation:
Increased total serum lactic dehydrogenase (LD) activity, confined to fractions 4 and 5 is most likely to be associated with: A. Pulmonary infarction B. Hemolytic anemia C. Myocardial infarction D. Acute viral hepatitis
D.Acute Viral Hepatitis
inflammation of the liver caused by infection with one of the five hepatitis viruses
Hope it helps (≧∇≦)/
What type of reaction is: iron + sulfur -> iron sulfide? A. Double Replacement B. Decomposition C. Synthesis D. Combustion
Answer:
Hi there. In this question, we are trying to classify this reaction type. What we see happening here is we're told that we have sulfur which is in its solid state and it is reacting with solid iron And they're going to produce solid Iron three sulfide. So that is going to be f. E two S. Three. And that is a solid. I know it was F. E two S. Three because the iron three tells us the charge on the iron is three plus and sulfur voice forms ions with a too negative charge. Therefore it has to be FE two S 3. We can balance this equation although that's not necessary for this problem. But it's kind of quick. So I'll go ahead and do that. Okay, but we want to know what type of reaction it is. So we're looking for a pattern here when we see an element sulfur, it's combining with another element iron and it's producing a compound. So only one product. Alright, so looking at this general reaction type, there's only one reaction type of those five listed there, there's only one reaction type that has just one product and that is a synthesis reaction. A synthesis reaction follows this pattern where we are taking two or more simpler substances and combining them to make more complex compounds. Alright, with the simplest synthesis being element plus element equals compound. So this would be a synthesis reaction. Thank you for asking a question. And I hope this was helpful
Answer:
It should be D) Combustion Reaction
What is the compound number (enter both the number and letter without spaces e. g. 1d, 2h) for trans-cinnamic acid?
99 140-10-3.
99 140-10-3 is the compound number for trans-cinnamic acid.
What do you mean by compound numbers?A subscript is the little number that appears to the right of an element's symbol. That figure represents how many atoms of that element are contained in the complex.What is the purpose of trans-Cinnamic acid?The creation of trans-cinnamic acid's methyl, ethyl, and benzyl esters is its primary usage, while it is also used to make flavors, colors, and medications. These esters play a significant role in perfume composition. The sweetener aspartame is a precursor of the acid.What other name would you give trans-Cinnamic acid?Phenolacrylic acid
The class of chemical compounds known as cinnamic acids includes trans-cinnamic acid, often referred to as (e)-cinnamic acid or phenylacrylic acid. These are organic aromatic compounds that generate 3-phenylprop-2-enoic acid from benzene and a carboxylic acid group.To learn more about trans-cinnamic acid visit:
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Benzoic acid is a common food preservative. the pka of benzoic acid is 4. 20. what is true of the relative strengths of benzoic acid (ba) and its conjugate base (b-)?
Here BA is benzoic acid and B- is conjugate base;
BA is weaker than B- because the Ka < Kb
--> BA is stronger than B- because the Ka > Kb
BA is stronger than B- because the Ka < Kb
BA is weaker than B- because the Ka > Kb
A conjugate acid-base pair, according to the Brnsted-Lowry definition of acids and bases, consists of two substances that are distinct only in that they contain a proton (H+). When a proton is supplied to a base, a conjugate acid is created, and vice versa when a proton is taken away from an acid, a conjugate base is created. Yuki Jung was the creator.
The power of an acid (or base) is inversely proportional to the power of its conjugate base (or conjugate acid): The conjugate base of an acid is weaker the stronger it is. The conjugate base of a weaker acid has a stronger base. A pair of chemical species known as conjugate acid and conjugate base exhibit opposing chemical behaviors.
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In an electric current, the ___ particles flow or are pushed along a path
positive
negative
neutral
100 POINTS - is air trapped in a jar a compound, element, homogeneous mixture or heterogeneous mixture
Answer:
homogenous mixture
Explanation:
homogenous mixtures appear in one phase and have even particle distribution.
Answer:
Air is indeed a homogeneous mixture of dinitrogen, dioxygen, carbon dioxide and a few other gases. All of the gases are in the same phase, and thus constitute a homogeneous mixture.
Explanation:
hope it helps youCalculate [hy3−] in a solution prepared by mixing 10. 00 ml of 0. 0305 m voso4, 9. 20 ml of 0. 0305 m edta, and 10. 00 ml of buffer with a ph of 4. 0
The concentration of [ Hy³] = 4.861 *28⁻²³
The concentration of a solution is a measure of the amount of solute that has been dissolved in a given amount of solvent or answer. A focused answer is one which has a exceedingly massive quantity of dissolved solute. A dilute answer is one that has a tremendously small amount of dissolved solute.
Given,
Molarity of VoSo4 ,M = 0.02M
Vol of VoSo4 , V = 10 ml
Molarity of EDTA = 0.02 M
vol of EDTA = 9.10 ml = 0.0091 L
& 10 ml of buffer with pH =4
NOW,
no. of moles of EDTA = molarity * Volume (L)
= 0.02 M * 0.0091 L
= 182 * 10^-6 moles
= 1.82 * 10^-4 moles
Now,
∝ Y^3- = [tex]\frac{[Y^3-]}{moles of edta}[/tex]
[ Y^3-] = ∝ Y^3- * moles of EDTA
Given,
at pH = 4, ∝ Y^3- = 3*10^-9
∴ ∝ Y^3- = 3*10^-9
[ Y^3-] = 3*10^-9 * 1.82 * 10^-4
= 5.46 * 10^-13
Now, K f = [H2Y^2-]/[vo^2+][y3-]
[vo^2+] = 18.7
[H2Y2-] = K f * [ v o+][Y^2-]
[H2Y2] = 3.762 * 10^-13
[ HY^3-] = 4.8 * 10^-23
So, the concentration of the [ HY^3-] is 4.8 * 10^-23
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I WILL MARK U BRAINLIEST IF U ANSWER THIS QUESITON
Answer:
c ) 16
Explanation:
C4 H10 O + 6 O2 =====> 4 CO2 + 5 H2O
1 + 6 + 4 + 5 = 16
Answer:
C.) 16
Explanation:
An equation is balanced when there are equal amounts of each element on both sides of the reaction. These values can be modified by adding coefficients.
The unbalanced equation:
C₄H₁₀O + O₂ -----> CO₂ + H₂O
Reactants: 4 carbon, 10 hydrogen, 3 oxygen
Products: 1 carbon, 2 hydrogen, 3 oxygen
The balanced equation:
1 C₄H₁₀O + 6 O₂ -----> 4 CO₂ + 5 H₂O
Reactants: 4 carbon, 10 hydrogen, 13 oxygen
Products: 4 carbon, 10 hydrogen, 13 oxygen
Now, you can add the coefficients:
1 + 6 + 4 + 5 = 16
Any request or distribution of phi should contain only the minimum amount of phi required to complete the intended task. True or false?.
True
The bare minimum required standard
The minimal necessary standard restricts uses, disclosures, and requests for PHI to the bare minimum amount required to fulfil the use's or disclosure's intended purposes.
What is HIPAA Minimum necessary standard ?Under the Privacy Rule's Minimum Necessary Standard, covered entities are required to take all necessary precautions to ensure that protected health information (PHI) is only accessed as much as is required to carry out the duties at hand.
When a health care provider seeks something or discloses something to them for medical treatment, the minimum necessary criterion does not apply. Additionally, it does not apply to disclosures or uses made to an individual or with that person's consent.In order to reduce the possibility of a breach or employee wrongdoing, this guideline aims to establish the precedent of handling PHI as little as feasible.Learn more about HIPAA here:
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Calculate the pressure (in atm) exerted by 1.82 moles of a gas in a steel vessel of volume 5.43 l at 69.50 c.
The pressure in atm is 6.8.
Calculation,
According to ideal gas law,
PV = nRT ..(i)
P is pressure = ?V is volume = 5.43 Ln is number of moles = 1.82 moles T is temperature = 69.50°C = 69.50°C + 278 K = 247.50 KR is universal gas constant = 0.082 atm L/K molPutting the value of all given data in equation (i) we get,
P×5.43 L = 1.82 moles ×247.50 K × 0.082 atm L/K mol
P = 1.82 moles ×247.50 K × 0.082 atm L/K mol /5.43 L = 6.8 atm
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When adjusted for any changes in δh and δs with temperature, the standard free energy change δg∘t at 600 k is equal to 1. 4×10^5j/mol. Calculate the equilibrium constant at 600 k.
The standard free energy change ΔG° at 600 K is equal to 1. 4×[tex]10^5[/tex]J/mol then the equilibrium constant at 600K is 0 .
Calculation ,
ΔG° = - RT㏑Kp
Where ΔG° = standard free energy change = 1. 4×[tex]10^5[/tex]J/mol
R = universal gas constant = 8.3 J / K mol
T = temperature = 600K
Kp = equilibrium constant
Now putting the value of all data in equation (i) we get ,
1. 4×[tex]10^5[/tex]J/mol = - 8.3 J / K mol × 600K ㏑Kp
- 1. 4×[tex]10^5[/tex]J/mol /8.3 J / K mol × 600K = ㏑Kp
㏑Kp = - 6972×[tex]10^5[/tex]
Kp = 0
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When an electron in a hydrogen atom jumps from an orbital farther from the nucleus to an orbital closer to the nucleus, it?
When an electron in a hydrogen atom jumps from an orbital farther from the nucleus to an orbital closer to the nucleus, the energy is emitted.
The energy of electron decreases. When it goes, the electron release a photon of electromagnetic energy.
When an electron jumps from higher energy orbital to lower energy orbital, the difference in the energies of these two orbitals is radiated as quantum.
E = hc/wavelength
The photon is emitted with the electron moving from higher energy level to lower energy level.
The wavelength of emitted radiation would be (27/32) × wavelength.
Thus we concluded that the energy of photon is exact energy that is lost by the electron moving to its lower energy level.
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Pick the word that best completes the following sentence. A
mixture is a mixture in which the composition is
uniform throughout the mixture.
a homogeneous
b heterogeneous
C compound
Assuming the salt is sodium chloride, what is the approximate molar concentration of salt in ocean water if the density of ocean water is 1.028 kg/l?
Molar concentration of Sodium chloride (NaCl) means the number of moles of sodium chloride present in 1L of water.
Molar mass of NaCl = Molar mass of Na + Molar mass of Cl
Molar mass of NaCl = 23 + 35.5
Molar mass of NaCl = 58.5g
∴ 1L of water contains 55.55 moles of water. Hence,
Mass of ocean water = 55.55 × 18 = 999.9g
Since, 1L of ocean water has a mass of 999.9g of which 3.5% is the salt.
hence, (999.9) (0.035) = 34.99g
So, No. of moles of NaCl = Mass of NaCl / 58g NaCl per mol
No. of moles of NaCl = 34.99/58.5
No. of moles of NaCl = 0.59 moles
So, Molar concentration or Molarity would be 0.59 moles present in 1L of solution.
Hence, Molarity or Molar Concentration = Moles of NaCl/ Volume of solution (in L)
Molarity = 0.59/1L
⇒ Molarity = 0.59M
Hence, the molarity is 0.59M
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A cylinder with a movable piston contains 2.00 g of helium, He , at room temperature. More helium was added to the cylinder and the volume was adjusted so that the gas pressure remained the same. How many grams of helium were added to the cylinder if the volume was changed from 2.00 L to 3.90 L
Heya....
Here's your answer.....
PV = nRT... R is a constant...
so PV/nT = constant...
P1V1 / n1T1 = P2V2 / n2T2...P is constant.T is constant.. so
V1 / n1 = V2 / n2
since n = mass / mw
V1 / (mass 1 / mw) = V2 / (mass 2 / mw)
and since molecular mass = constant
V1 / mass 1 = V2 / mass 2
mass 2 = V2 x mass 1 / V1 = 2.90L x 2.00 g / 2.00 L = 2.9 g
mass 2 - mass 1 = 2.90 g - 2.00 g = 0.90 g
ie.. 0.90 g of He was added.
Thanks...!!!
Which clinical finding represents a contraindication to the administration of nitroglycerin?
Represents a contraindication to the administration of nitroglycerin increased intracranial pressure
Nitroglycerin is a vasodilator that is primarily used to treat anginal chest discomfort. It is now licensed by the FDA for the acute alleviation of an attack or the acute prevention of angina pectoris caused by coronary artery disease.
Nitroglycerin is used to treat coronary artery disease-related angina (chest pain). This medication can also be used to treat an existing angina attack. Nitroglycerin is a common treatment for heart problems. It's the go-to medication for people suffering from angina pectoris, who take it as a sublingual tablet or an oral spray.
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The solubility KI is 50 g in 100 g of H2O at 20 °C. if 110 grams of ki are added to 200 grams of H2O ________
The solubility KI is 50 g in 100 g of H₂O at 20 °C. if 110 grams of ki are added to 200 grams of H₂O the solution will be saturated.
What is solubility?Solubility is a condition where the solute is fully dissolved in the solvent. When fully mixed with the solvent.
Given that 50 g of KI is added to 100 g of water at 20 °C it means 100 g of water can dissolve a maximum of 50 g of KCl.
1 g of water will dissolve an quantity of 0.5 g of KCl.
To assay for 200 g of water: 200 g of water can disintegrate a maximum of (0.5) x 200 g of KCl.
The maximum amount of KCl that will dissolve is 100 g
Actualised amount dissolved = 110 g
when Amount dissolved > Maximum solubility limit
110 g > 100 g
Thus, the solution is saturated.
To learn more about solubility, refer to the below link:
https://brainly.com/question/8591226
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