Discover a world of knowledge and community-driven answers at IDNLearn.com today. Discover prompt and accurate answers from our experts, ensuring you get the information you need quickly.

How many moles (of molecules or formula units) are in each sample?

Express your answer in moles to three significant figures.


1) 18.0 g NO2

2) 1.35 kg CO2

3) 46.1 g KNO3

4) 191.8 kg Na2SO4