Identify the equations that show ionization. Check all that apply.
NaCl(s) →Na(aq) + CI+ (aq)
HCK(g)+H2O(1)→H30* (aq) +Cr (aq)
O2(g)–Oz(aq)
CO2(g)+2H20(1) -HCO3(aq) +H30* (aq)
CaCl2(s) Ca2+ (aq) +2Cr(aq)
DONE

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%

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