Question

In a chemical reaction, you collect 1 L of hydrogen gas at STP. How many moles of hydrogen gas did you collect?

A) 0.004
B) 0.002
C) 0.02
D) 0.04

Answer 1

Based on the constants and the different standard conditions, each mole of any gas will occupy a volume of 22.4 L with the assumption that the gas is an ideal gas. From the given, there is 1 mole of nitrogen gas. We multiply this number of moles by the Avogadro's number, obtaining 6.022 x 10^23. Thus, the answer is letter B.