Question

calculate the molecular mass of the following:(1)H2O (2)CO2 (3)CH4

Answer 1

molecular mass of the following are: 1)18 2)44 3)16

Answer 2

Answer :

Molecular mass of:-

• $\rm{H_2O=18.016\:amu.}$
• $\rm{CO_2=44.01\:amu.}$
• $\rm{CH_4=16.042\:amu.}$

Step-by-step explanation :

Given that,

• Compounds are: $\rm{H_2O,CO_2,CH_4.}$

Also,

• Molar mass of hydrogen = 1.008 amu.
• Molar mass of carbon = 12.01 amu.
• Molar mass of oxygen = 16.00 amu.

$\hrulefill$

1. Molecular mass of $\bold{H_2O}$ :

$\implies\rm{2(1.008\:amu)+16.00\:amu}$

$\implies\rm{18.016\:amu.}$

2. Molecular mass of $\bold{CO_2}$ :

$\implies\rm{12.01\:amu+2\times{}16.00\:amu}$

$\implies\rm{44.01\:amu.}$

3. Molecular mass of $\bold{CH_4}$ :

$\implies\rm{12.01\:amu+4\times{}1.008\:amu}$

$\implies\rm{16.042\:amu.}$