Calculate the mass of the following
a. One atom of calcium
b. One molecules of `SO_(2)`

Answer

A, B, C, D

Explanation

(i) `6.022 xx 10^(23)` atoms of calcium have mass = 40 g
1 atoms of calcium has mass `=40/(6.022 xx 10^(23)) = 6.44 xx 10^(-23)`g
(ii) Mass of `6.022 xx 10^(23)` molecules of `SO_(2) = 64`g
Mass of 1 molecules of `SO_(2) = 64/(6.022 xx 10^(23))`
`=1.06 xx 10^(-22)`g