Question

The molar mass of carbon is 12 g mol-1. How many moles are there in 3g of carbon?

Answer 1

Answer:

0.25

Explanation:

moles=weight of compound/molecular or atomic mass

moles=3/12=1/4=0.25

Answer 2

Given:

The molar mass of carbon is 12 g mol-1.

To find:

The number of moles present in 3 grams of carbon.

Solution:

To determine the number of moles we have to follow the below steps-

Carbon is a group of 12 elements. It has an atomic number of 6 and a molar weight of 12 grams/mol.

Thus we can write-

12 grams of the element carbon occupy 1 mole.

Hence 3 grams of the element carbon occupy

3/12=0.25 mole.

Hence 3 grams of the element carbon occupy 0.25 mole.