Question

In a 10-gram sample of carbon and a 10-gram sample of sulfur, how many more moles of carbon are there than sulfur?

Answer 1

Answer : The more moles of carbon there than sulfur are, 0.52 moles.

Explanation : Given,

Mass of carbon = 10 g

Mass of sulfur = 10 g

Molar mass of carbon = 12 g/mol

Molar mass of sulfur = 32 g/mol

First we have to calculate the moles of carbon and sulfur.

$\text{Moles of carbon}=\frac{\text{Given mass carbon}}{\text{Molar mass carbon}}$

$\text{Moles of carbon}=\frac{10g}{12g/mol}=0.833mol$

and,

$\text{Moles of sulfur}=\frac{\text{Given mass sulfur}}{\text{Molar mass sulfur}}$

$\text{Moles of sulfur}=\frac{10g}{32g/mol}=0.312mol$

From this we conclude that,

Moles of carbon = 0.833 mol

Moles of sulfur = 0.312 mol

Difference between the moles of carbon and sulfur = 0.833 - 0.312 = 0.521 mol = 0.52 mol

Thus, the more moles of carbon there than sulfur are, 0.52 moles.

Answer 2

Your answer will be the second option