Chemistry Regents Exam August 2022
8. Hydrogen sulfide, H2S, is classified as a
(1) compound with atoms in a fixed proportion
(2) compound with atoms in a proportion that can vary
(3) mixture with atoms in a fixed proportion
(4) mixture with atoms in a proportion that can vary
Explanation: H2S consists of two elements (hydrogen and sulfur) and is a compound. Compounds consist of two or more elements combined together in a fixed proportion.
Answer: 1