June 2018 NY Regents Chemistry Exam
12 What is represented by the chemical formula PbCl2(s)? (1) a substance (2) a solution (3) a homogeneous mixture
(4) a heterogeneous mixture
Solution: A mixture consists of multiple substances. PbCl2(s) represents one compound only, in solid state, eliminating choices 3 and 4. Solution is a mixture as well, eliminating choice 2.
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