Question

during the analysis, 0.163 g h₂o and 0.600 g co₂ are produced. calculate the amount (mol) h₂o formed by combustion of 0.400 g vitamin c.

Explanation:

Step1: Recall molar - mass formula

The molar - mass of water ($H_2O$) is $M_{H_2O}=(2\times1.01 + 16.00)\text{ g/mol}=18.02\text{ g/mol}$.

Step2: Use the formula $n=\frac{m}{M}$

We know the mass of water $m = 0.163\text{ g}$. Using the formula $n=\frac{m}{M}$, where $n$ is the amount in moles, $m$ is the mass, and $M$ is the molar - mass. Substitute $m = 0.163\text{ g}$ and $M = 18.02\text{ g/mol}$ into the formula: $n=\frac{0.163\text{ g}}{18.02\text{ g/mol}}\approx0.00905\text{ mol}$.

Answer:

$0.00905$