Question

I need heeelp............ what is the mass?

Answer 1

Amount of tin produced is 10grams.

Option D.

Explanation:

To calculate this problem, we need to know what is molecular weight. Molecular weight of a substance is defined as the weight of a mole of the molecules of that substance.

Here in the reaction, we can see that for every 3 moles of iron sulphide produced, the moles of tin produced is 2.

So for every 0.122 moles of iron sulphide, the number of moles of tin produced is $0.122\times\frac23$ =0.081 moles of tin.

Molecular weight of tin is 121.76grams.

So 0.081mole of tin weighs $0.081\times121.76$ grams =9.91 grams ~10grams.

So amount of tin produced is 10grams.