Four moles of nitrogen gas are contained in an enclosed cylinder with a movable piston.If the molecular mass of nitrogen is 28 u,how many grams of nitrogen are present?
A) 0.14
B) 56
C) 42
D) 112

Question

Quizplus · Accepted Answer

The molecular mass of nitrogen (N2) is 28 u, which means one mole of nitrogen gas weighs 28 grams. Therefore, four moles of nitrogen gas weigh 4 x 28 = 112 grams.

Four Moles of Nitrogen Gas Are Contained in an Enclosed