How many grams of Cas, are produced from 2.500 moles of CaQ?
4 HgS. +4 Cal. → 4Hg + 3CaS + CaSO4

Mass of CaS : 135.27 g

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.

Reaction

4 HgS(s)+ 4 CaO(s) → 3 CaS(s) + CaSO₄(s) + 4Hg(l).

MW CaS : 72,143 g/mol

it is b that is the answer.

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