What is the mass in grams of exactly 3 moles of nitrogen molecules?

0 ⤊

Nitrogen in its normal state exists as a diatomic molecule.
Three significant figures are sufficient for your answer.

2007-12-19 00:31:08 · 2 answers · asked by Tiana 2 in Science & Mathematics ➔ Chemistry

molar mass of nitrigen = 14
exactly 3 moles of nitrogen = 14 * 3 = 42.0 grams

2007-12-19 00:37:11 · answer #1 · answered by msafiullah 3 · 0⤊ 0⤋

The nitrogen gas has for formula N2 (N2 is a molecule)
Its mass is 2*14=28g
So 3 moles = 3*28=84g

2007-12-19 00:58:59 · answer #2 · answered by maussy 7 · 0⤊ 0⤋