What is represented by the chemical formula PbCl2(s)?(1) a substance(2) a solution(3) a homogene

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.

Answer:1

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