use the equation below to answer the following question. how many grams of potassium chloride (kcl) are…

Explanation:

Step1: Calculate molar - masses

The molar mass of $KClO_3$: $M_{KClO_3}=39.1 + 35.5+3\times16=122.6\ g/mol$. The molar mass of $KCl$: $M_{KCl}=39.1 + 35.5 = 74.6\ g/mol$.

Step2: Determine mole of $KClO_3$

The number of moles of $KClO_3$, $n_{KClO_3}=\frac{m_{KClO_3}}{M_{KClO_3}}=\frac{25\ g}{122.6\ g/mol}\approx0.204\ mol$.

Step3: Use mole - ratio

From the balanced equation $2KClO_3\rightarrow2KCl + 3O_2$, the mole - ratio of $KClO_3$ to $KCl$ is $1:1$. So, $n_{KCl}=n_{KClO_3}=0.204\ mol$.

Step4: Calculate mass of $KCl$

The mass of $KCl$, $m_{KCl}=n_{KCl}\times M_{KCl}=0.204\ mol\times74.6\ g/mol\approx15\ g$.

Answer:

15 g KCl