Question

How many moles are in 30.1 grams of O ? Watch your significant figures.

et
1.88 moles O
1.9 moles O
1.88 g O
2.00 g O

Answer 1

1 mole of O contains 16g

x mole of O will contains 30.1 g

= 16x = 30.1

16x/16= 30.1/16

= 1.88 mole of O

the answer is 1.88 mole of O