Question

What is the mass of `4.22 x 10^23` atoms of lead?

Answer 1

145.2

Explanation:

1 mole (`6.022*10^(23)` molecules ) weigh 207.2 gm
for `4.22*10^(23)` molecules weight weight `=>`
`(4.22*10^(23))/(6.022*10^(23))*207.2=145.2g`