How many moles of hydrogen sulfide are contained in a 49.7-g sample of this gas?

Name: How many moles of hydrogen sulfide are contained in a 49.7-g sample of this gas?
Brand: Quizplus
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Question

Quizplus · Accepted Answer

To solve this problem, we need to use the molar mass of hydrogen sulfide (H2S): 
2(1.008) + 32.06 = 34.076 g/mol
Then we can use the following formula:
moles = mass/molar mass
moles = 49.7 g / 34.076 g/mol ≈ 1.46 mol
Therefore, the answer is B) 1.46 mol.

How Many Moles of Hydrogen Sulfide Are Contained in a 49.7-G