Question

the distance between the sun and earth is about 1.5 x 10^11m. express this distance with SI prefix and in kilograms

Answer 1

The prefix for the number 1.5x10^11 m is hundred-giga...
A quantity of meters can't be expressed in units of mass. If it could, then you'd be able to calculate how many kilograms you have to walk or ride to get to school.