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jek_recluse [69]
2 years ago
15

How many moles of magnesium are in 3. 01 x 10^22 atoms of magnesium.

Chemistry
1 answer:
marshall27 [118]2 years ago
5 0

Answer:

Explanation:

1 mol of anything is 6.02 * 10^23 atoms (in this case)

x mol of 3.01 * 10^22

Set up the proportion

1/x = 6.02*10^23 / 3.01 * 10^22                 Cross multiply

x*6.02 * 10^23 = 1 * 3.01 * 10^22               Divide by 6.02*10^23

x = 3.01 * 10^22 / 6.02*10^23

x = 1/(2 * 10)

x = 1/20 mol

x = 0.05 mol

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<u>Answer:</u> The value of K_{eq} is 0.044

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We are given:

Initial moles of methane = 4.10\times 10^{-2}mol=0.0410moles

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Concentration of a substance is calculated by:

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So, concentration of methane = \frac{0.0410}{1.00}=0.0410M

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<u>Initial:</u>          0.0410    0.0651

<u>At eqllm:</u>     0.0410-x   0.0651-x       2x

We are given:

Equilibrium concentration of carbon tetrachloride = 6.02\times 10^{-2}M=0.0602M

Evaluating the value of 'x', we get:

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Equilibrium concentration of CH_2Cl_2=2x=[2\times 0.0049]=0.0098M

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K_{eq}=\frac{[CH_2Cl_2]^2}{[CH_4]\times [CCl_4]}

Putting values in above expression, we get:

K_{eq}=\frac{(0.0098)^2}{0.0361\times 0.0603}\\\\K_{eq}=0.044

Hence, the value of K_{eq} is 0.044

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