Question

8.Gold has a density of 19.30 g/cm3. If a person who weighs 85.00 kg (1 kg = 1000 g) were given his or her weight in gold, what volume (in cm3) would the gold occupy? Are we justified in using the SI unit of mass for the person’s weight in this case?

Answer 1

Use stoichiometry ( Dont know if you learned what it is yet) but its very helpful for unit convertion. So it goest like this:

85kg * 1000g / 1kg * 1cm^3 / 19.30g = volume of gold in centimeter.
So Kg cancels Kg ( like x * y/x , x gets cancels). And so on and so forth.

For using the SI unit, I would say yes 1) because SI units are ALWAYS to be use ( in my opinion), even with huge number you can use scientific notations. And I think anyway that the weight of a person in G would be too high. Hope I helped :)