What mass of hcl is contained in 30.0ml of a solution, Ask an Expert

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What mass of HCl is contained in 30.0ml of a solution which is 37.2 mass% HCl has a density of 1.19g/ml.

Determine What is the percent yield of carbon dioxide(CO2) if 50.0 grams of C₂H₂ ,acetylene is allowed to react with excess O2, 75.0 grams of carbon dioxide are formed.?

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