How many grams of CuCl are produced from 78.9g of HCl?

2CuCl + H2S - -> Cu2S + 2HCl

The mass of CuCl is 214.2 grams

Explanation:

Step 1: Data given

Mass of HCl = 78.9 grams

Molar mass HCl = 36.46 g/mol

Molar mass of CuCl = 99.0 g/mol

Step 2: The balanced equation

2CuCl + H2S → Cu2S + 2HCl

Step 3: Calculate moles HCl

Moles HCl = mass HCl / molar mass HCl

Moles HCl = 78.9 grams / 36.46 g/mol

Moles HCl = 2.164 moles

Step 4: Calculate moles CuCl

For 2 moles CuCl we need 1 mol H2S to produce 1 mol Cu2S and 2 moles HCl

For 2.164 moles HCl we'll need 2.164 moles CuCl

Step 5: Calculate mass CuCl

Mass CuCl = moles CuCl * molar mass CuCl

Mass CuCl = 2.164 moles * 99.0 g/mol

Mass CuCl = 214.2 grams

The mass of CuCl is 214.2 grams