Asked Dec 13, 2019

Write the correct formula to distinguish between calcium sulphide and calcium hydrogen sulphide? Which has greater molecular mass?


Expert Answer

Step 1

Molecular formula of calcium sulphide is CaS.

Molecular mass of CaS = molar mass of Ca + molar mass of S

Molecular mass of CaS = 40.078 g/mol + 32.065 g/mol

Molecular mass of CaS = 72.143 g/mol

Step 2

Molecular formula of calcium hydrogen sulphide is CaH2S.

Molecular mass of CaH2S = molar mass of Ca + 2(molar mass of H) + molar mass of S

Molecular mass of CaH2S = 40...

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