Question

Determine the number of hydrogen atoms in the Sun. The mass of the Sun is 2×1030kg. About 70% of it by mass is hydrogen, 30% is helium, and there is a negligible amount of other elements.

Answer 1

`8.36541* 10^(56)`

Step-by-step explanation:

Mass of the sum =
`2* 10^(30)\ kg`

70% of this mass is

`0.7* 2* 10^(30)=1.4* 10^(30)\ kg`

Mass of hydrogen in the sun is
`1.4* 10^(30)\ kg`

Mass of a hydrogen atom =
`1.6735575* 10^(-27)\ kg`

Dividing the mass hydrogen in the sun by the mass of one hydrogen atom will give us the number of hydrogen atoms

`(1.4* 10^(30))/(1.6735575* 10^(-27))=8.36541* 10^(56)`

The number hydrogen atoms in the Sun is
`8.36541* 10^(56)`