Question

How many moles are in 15.89 grams of CH4?

Answer 1

Moles, Molar Mass and Mass

We must apply the following equation:

`n=(m)/(M)`

• n = moles
• m = mass
• M = molar mass

Solving the Question

We're given:

• m = 15.89 g
• M = sum of C + H4 = 16.04 (taken from Chemspider)

Apply the equation:

`n=(m)/(M)`

`n=(15.89)/(16.04)`

`n = 0.9906\hspace{4}mol`

Answer

0.9906 mol