Question

What is the mass of 0.10 mole of methane (CH4)?

A. 0.10 gram
B. 1.00 gram
C. 1.60 grams
D. 16.00 grams

Answer 1

Calculating for mass given moles:

Generally:
`n=(n)/(M) }`

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

Rearranging the equation we get:

`m=nM`

1. Finding the molar mass of a compound

• is the sum of the molar masses of each element respective to the coefficients and subscripts
• MM of CH4:

`1(12.0g/mol) +4(1.01g/mol) = 16.05g/mol`

2. Insert the known values and solve

`m=(0.10mol)(16.05g/mol)`

`m=1.60 g`