Question

The mass of a proton is `1.67272 x 10^-27` kg. What is its mass in ng?

Answer 1

`1*ng` `=` `10^-9g`, and `1*kg` `=` `10^3*g`

Explanation:

Well `1*ng` `=` `10^-9g`, and `1*kg` `=` `10^3*g`

Thus `1*ng` `=` `10^-12*kg`

So `1.67272xx10^-27*kg` `=` `(1.67272xx10^-27*kg)/(10^-12*kg*ng^-1)` `=` `1.67272xx10^-15*ng`