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3 years ago

Moles /Number of Particles Con

Chemistry

1 answer:

Olin [163]3 years ago

7 0

(2.03x10^22)/(6.02x10^23) = .033721 mol Li

I hope this helps, if not, i am sorry

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Consider the malate dehydrogenase reaction from the citric acid cycle. Given the listed concentrations, calculate the free energ

Ahat [919]

Answer: The Gibbs free energy of the reaction is 21.32 kJ/mol

Explanation:

The chemical equation follows:

$\text{Malate }+NAD^+\rightleftharpoons \text{Oxaloacetate }+NADH$

The equation used to Gibbs free energy of the reaction follows:

$\Delta G=\Delta G^o+RT\ln K_{eq}$

where,

$\Delta G$ = free energy of the reaction

$\Delta G^o$ = standard Gibbs free energy = 29.7 kJ/mol = 29700 J/mol (Conversion factor: 1 kJ = 1000 J)

R = Gas constant = 8.314J/K mol

T = Temperature = $37^oC=[273+37]K=310K$

$K_{eq}$ = Ratio of concentration of products and reactants = $\frac{\text{[Oxaloacetate]}[NADH]}{\text{[Malate]}[NAD^+]}$

$\text{[Oxaloacetate]}=0.130mM$

$[NADH]=2.0\times 10^2mM$

$\text{[Malate]}=1.37mM$

$[NAD^+]=490mM$

Putting values in above expression, we get:

$\Delta G=29700J/mol+(8.314J/K.mol\times 310K\times \ln (\frac{0.130\times 2.0\times 10^2}{1.37\times 490}))\\\\\Delta G=21320.7J/mol=21.32kJ/mol$

Hence, the Gibbs free energy of the reaction is 21.32 kJ/mol

4 0

3 years ago

A sample of carbon tetrachloride (CCI) contains 3 moles of the substance. How many atoms are there in the sample?

STALIN [3.7K]

Answer:

Number of atoms =1.806×10²⁴

Explanation:

You have the number of moles of Carbon tetrachloride which is n=3

And you are looking for number of atoms that are in the sample, which are represented by the letter "N"

The formula that has both number of moles(n) and number of atoms(N) is written as n=N/Na

Na is called the Avogadros number and it is equal to 6.08×10²³, it never changes(it is a constant)

So you will substitute the number of moles and the avogadros number to you formula, and the only unknown will be the number of atoms which you are looking for

n=N/Na
3=N(6.02×10²³)
N=1.806×10²⁴ atoms of CCl

NB: N does not represent the number of atoms only. It may also represent the number of particles or molecules...

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3 years ago

Which career best fits the group of words below?

Phantasy [73]

Answer:

The answer is "power dispatcher."

Explanation:

"Power dispatchers" are also known as "power distributors." Their field of work is related to controlling the distribution of electricity to the "electrical substations." These substations allow the transmission of electricity to step down from a higher voltage to a lower voltage.

Whenever there is an electrical problem, the power dispatcher also comes into play. They make sure that the power lines are intact and checks for possible damages when typhoons or earthquakes occur.

Thus, this explains the answer.

8 0

4 years ago

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Which of the following phase changes is an exothermic change!

dangina [55]

Answer:

It's deposition

Explanation:

I just know so go ahead and click that brainliest button

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3 years ago