Question

How many moles of O2 are in 8.4 g of oxygen?

Answer 1

0.263 moles

Step-by-step explanation:

molar mass of O = 15.999
molar mass of O2 = 15.999 X 2 = 31.998

1 mole of O2 weights 31.998 grams

8.4 g O2 * [ 1 mole O2/31.998g ] = 0.263 moles