Commercial brass, an alloy of Zn and Cu, reacts with hydrochloric acid os follows:Zn ( s ) + 2 HCl ( a q ) → ZnCl 2 ( a q ) + H 2 ( g )(Cu does not react with HCl.) When 0.565 g of a certain brass alloy is reacted with excess HCl, 0.0985 g ZnCl2 is eventually isolated.a. What .is the composition of the brass by mass?b. How could this result be checked without changing the above procedure?

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Q: A chemist dissolves a 1.497-g sample of a type of metal (an alloy of Sn, Pb, Sb, and Cu) in nitric…

A: Reaction: Sn + 2HNO3 → H2SnO3 + 2NO3 mass of tin = 0.4909 g molar mass of tin oxide  = 150.69 g/mol…

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A: Given: Mass of K [Ag (CN)2]=35.27g Formula: Molarity = Moles of soluteVolume of solution in…

Q: 2. Silver is often extracted from ores such as K[Ag(CN)₂] and then recovered by the reaction…

A: This can be solved using the concept of stoichiometry with unitry method as shown.

Q: Silver is often extracted from ores such as K[Ag(CN)2] and then recovered by the reaction…

A: Using mole concept easily determines how much moles of reactant used and how much moles of products…

Q: Silver is often extracted from ores such as K[Ag(CN)2] and then recovered by the…

A: (a)

Q: Commercial brass, an alloy of Zn and Cu,reacts with hydrochloric acid as follows: Zn(s) + 2 HCl (aq)…

A: Given: mass of brass alloy = 0.565 g mass of ZnCl2 produced = 0.0985 g molar mass of Zn = 65.38…

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Q: For the following reaction, if I start this reaction with 305.5 g potassium bisulfite and an excess…

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Q: b To make NaTcO4, the metal is dissolved in nitric acid 7 HNO3 (aq) + Tc(s) → HTCO4(aq) + 7 NO2(g) +…

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Q: 2. An iron ore was analyzed by dissolving a 1.1324-g sample in concentrated HCl. The resulting…

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".