Calculate the number of moles in 2.4g of carbon

0.2

Explanation:

1. First, figure out the molar mass of said element (s).

The molar mass of carbon is 12.0107. Whether you round this or leave it as is depends on your's and/or your teacher's personal preference.

2. Next, convert grams to moles by dividing the initial mass of carbon by the molar mass. Round if neccecary.

2.4g : 12.0107g/mol = 0.2mol