Read the molecular structure

The antiviral compound shown is Favipiravir, whose molecular formula is: $\mathrm{C_5H_4FN_3O_2}$

Calculate its molar mass

Using the given atomic masses:

• Carbon: $5 \times 12 = 60$
• Hydrogen: $4 \times 1 = 4$
• Fluorine: $1 \times 19 = 19$
• Nitrogen: $3 \times 14 = 42$
• Oxygen: $2 \times 16 = 32$

Therefore, $M = 60 + 4 + 19 + 42 + 32 = 157\ \text{g mol}^{-1}$

Mass of $0.1$ mol

$m = nM = 0.1 \times 157 = 15.7\ \text{g}$

Match with the required form

We need $15.7\ \text{g} = 157 \times 10^{-1}\ \text{g}$

Nearest integer $= 157$.

Compare with stored answer

My derived answer is 157, but the stored correct answer is 372.

So, I do not agree with the stored answer.