Question

Calculate the molecular mass of the following :

1. H₂O_{​​​​​​} 

2. CO₂

3. CH₄

Answer 1

1. Molecular mass of H₂O 

= 2(1.008 u) +16.00 u 

= 18.016u

 2. Molecular mass of CO₂ 

= 12.01 u + 2(16.00 u) 

= 44.01 u 

3. Molecular mass of CH₄

= 12.01 u + 4(1.008 u) 

16.042 u