Question

What is the mass of:
a) 0.2 mole of oxygen atoms?
b) 10 moles of Na2SO3
c) 1.5 moles of Na+ions.
d) 4 moles of Aluminum atoms (atomic mass of Al = 27)

Answer 1

Answer:

1. 0.2×16=3.2

hope it helps

Answer 2

Answer:

(a) Mole of Oxygen atoms = 0.2 mole

Molar mass of oxygen atoms = 16 g

Mass of oxygen atoms = 16 × 0.2 = 3.2 g

(b) Mass of 10 moles of sodium sulphite is 1260 grams. So, the mass of 10 moles of sodium sulphite is 1260 grams..