Question

3.

Calculate the number of grams of calcium perchlorate (Ca(ClO4)2) in 6.37
x 1018 formula units of calcium perchlorate?

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* 10^(23)` formula units present in 238.9 g of calcium perchlorate

So,
`6.37* 10^(18)` formula units present in
`(6.37* 10^(18))/(6.022* 10^(23))* 238.9=0.00253g` of calcium perchlorate

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