Question

Question #85ef8

Answer 1

You first work out the molar mass of potassium sulfide.

Explanation:

The molecular formula is `K_2S` so we add the atomic masses from the periodic system chart:
`m(K_2S)=m(K)+2xxm(S)=39.10+2xx32.07=103.24`
If we take this in grams, we have one mol (or mole).

So 5.8 mol would be `5.8xx103.24~~599g`

If we take care of the 2 significant digits in the 5.8, AND use the SI-unit, the answer would be `0.60kg` In grams it would be `6.0xx10^2g`