Question

3.

Answer 1

Answer : The number of grams of calcium perchlorate is, 0.00253 grams.

Explanation :

Molar mass of calcium perchlorate = 238.9 g/mol

As, $6.022\times 10^{23}$ formula units present in 238.9 g of calcium perchlorate

So, $6.37\times 10^{18}$ formula units present in $\frac{6.37\times 10^{18}}{6.022\times 10^{23}}\times 238.9=0.00253g$ of calcium perchlorate

Therefore, the number of grams of calcium perchlorate is, 0.00253 grams.