65. Solving a chemistry problem

65. Solving a chemistry problem

645. A mixture of iron and copper was treated with a solution of hydrochloric acid with a mass fraction of HCl 20% (ρ = 1.1 g/cm3). The mass fraction of iron in the mixture is 35%. Calculate the mass of the initial mixture, if the reaction produced a gas with a volume of 244 ml (N.O.), and the volume of the acid that reacted.

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