Question

Which would have a smaller mass: 3.400 moles of nitrogen or 2.500 moles of magnesium

Answer 1

Step-by-step explanation:

1 mol of N2 = 2 * 14 grams = 28 grams

3.400 moles of N2 = x

x = 3.400 * 28

x = 95.20 grams of Nitrogen

1 mol of magnesium = 24 grams

2.5 moles of magnesium = x Cross multiply

x = 24*2.5

x = 60

The Nitrogen has more mass.

Note: this is a guide on how to do the question. Chemistry has all sorts of periodic tables. Just us the mass numbers in your periodic table.