Question

How many moles of sulfur are there in a 0.685-g sample of sulfur?

A) 0.0214 mol
B) 46.8 mol
C) 22.0 mol
D) 32.1 mol

Answer 1

The number of moles of sulfur in a 0.685-g sample of sulfur is calculated using the molar mass of sulfur, 32 g/mol, resulting in 0.0214 mol, which corresponds to answer choice A.

Step-by-step explanation:

To calculate the number of moles of sulfur in a 0.685-g sample, we use the molar mass of sulfur. The molar mass of atomic sulfur (S) is 32 g/mol. Using the formula:

Number of moles = mass (g) / molar mass (g/mol),

We find:

Number of moles = 0.685 g / 32 g/mol = 0.0214 mol.

Therefore, the correct answer is A) 0.0214 mol.