Step-by-step explanation:
First let's find the molar mass of CaCl2:
Ca = 40.1 g/mol
Cl = 35.5 g/mol
40.1 + (35.5*2) = 111.1 g/mol
So:
111.1 g ---- 1 mol
430.11 g ---- x mol
x = 3.871 mol
Answer: 3.9 moles
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