Tetrachloroethylene, C2Cl4, is a dry cleaning fluid made from acetylene (C2H2), Cl2, and Ca(OH)2 according to this equation: C2H2(g) + 3Cl2(g) + Ca(OH)2(8) C2Cl4 (1) + CaCl2(s) + 2H2O(1)
How many moles of Cl2 are needed to react with 4.5 mol of C2H2?

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%

a polar bond is formed when electrons are shared unevenly between atoms

it is b that is the answer.

b.false that your answer