What is the formula unit mass of calcium chloride (CaCl2)?
111 u
Atomic mass of Ca = 40 u, atomic mass of Cl = 35.5 u.
Formula unit mass of CaCl2 = 40 + 2(35.5) = 40 + 71 = 111 u.
Hence, the formula unit mass of calcium chloride is 111 u.
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