A1.0-gram strip of zinc is reacted with hydrochloric acid in a test tube. the unbalanced equation below represents the reaction.
zn(s) + hcl(aq) ==> h2(g) + zncl2(aq)
balance the equation in your answer booklet for the reaction of zinc and hydrochloric acid, using the smallest whole-number coefficients. [1]
zn(s) + hcl(aq) ==> h2(g) + zncl2(aq)

The balanced chemical equation for the reaction of zinc and hydrochloric acid is written below.

Explanation:

A balanced chemical equation is defined as the equation in which total number of individual atoms on the reactant side is equal to the total number of individual atoms on product side.

Every balanced chemical equation follows law of conservation of mass.

The balanced chemical equation for the reaction of zinc and hydrochloric acid follows:

By Stoichiometry of the reaction:

1 mole of zinc metal reacts with 2 moles of aqueous hydrochloric acid to produce 1 mole of hydrogen gas and 1 mole of aqueous zinc chloride solution.

Hence, the balanced chemical equation for the reaction of zinc and hydrochloric acid is written above.

it should be all of them because it asks if you included all of those in your answer

explanation:

1. for the first question, we must find the mass of the anhydrous salt, mgso₄. the molar mass for mgso₄·7h₂o is 246.47 g/mol, while that of mgso₄ is 120.37 g/mol.7.834 g mgso₄·7h₂o * 1 mol mgso₄·7h₂o/246.47 g * 1 mol mgso₄/1 mol mgso₄·7h₂o * 20.37 g mgso₄/mol = 0.647 g mgso₄

2. mass of water = mass of sample - mass of anhydrous salemass of water = 7.834 - 0.647 = 7.19 gpercent water in hydrate = 7.19/7.834 * 100 = 91.74%