Question

What is the mass of a molecule of CO2 in grams?

(Molar mass of CO2 = 44 g mol-1

)​

Answer 1

Molar mass is the mass of 6.6 × 10²³ molecules

mass of 6.6 × 10²³ molecules = 44g

∴mass of 1 molecule = 44/6.6 × 10²³ molecules

                                   = 6.6 × 10⁻²³ g

Answer 2

MOLECULAR MASS -

• The mass of a molecule is the sum of the atomic masses of the constituting elements.
• The number of atoms of each element is significantly considered to find the molecular mass.
• In the given molecule of carbon dioxide, the molecular mass is 44grams.
• The 44grams is the mass equivalent to the Avagadro's number that is 6.022 × $10^2^3$ molecules.
• To calculate the mass of 1 molecule of carbon dioxide the calculation is as follows -

Mass of 6.022 ×$10^2^3$ molecules of $CO_2$ = 44g

Mass of 1 molecule of Carbon dioxide = $\frac{44}{6.022 x 10^2^3}$

Molecular mass = 7.3 × $10^-^2^3$ grams.

• The molecular mass of a molecule of carbon dioxide is 7.3 × $10^-^2^3$ grams.