Final answer:
The expected mass of hydrogen gas produced in the reaction of hydrogen chloride with zinc, yielding zinc chloride, is calculated using the law of conservation of mass. Subtracting the mass of zinc chloride produced (24 grams) from the total mass of reactants (30 grams) gives the mass of hydrogen gas as 6 grams.
Step-by-step explanation:
In a chemical reaction involving hydrogen chloride and zinc, the question queries about the expected mass of hydrogen gas produced when 10 grams of hydrogen chloride reacts with 20 grams of zinc resulting in the formation of 24 grams of zinc chloride. To solve this, we utilize the law of conservation of mass, which states that matter is neither created nor destroyed in a chemical reaction, implying that the mass of reactants equals the mass of products.
To identify the mass of hydrogen gas produced, we subtract the mass of the zinc chloride produced from the total initial mass of the reactants:
- Mass of zinc chloride (ZnCl₂) = 24 grams
- Total mass of reactants (hydrogen chloride + zinc) = 10 g + 20 g = 30 grams
- Expected mass of hydrogen gas (H₂) = Total mass of reactants - Mass of zinc chloride = 30 g - 24 g = 6 grams
Therefore, the mass of hydrogen gas expected to be formed in this reaction is 6 grams.