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Which of the following substances is a compound?
A.
solid bronze (an alloy of copper and tin)
B.
a salt water solution
C.
solid iron metal (Fe)
D.
hydrogen sulfide gas (H2S)

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Answer:

D. hydrogen sulfide gas (H2S)

Explanation:

A compound is composed of two or more elements chemically bound together.

In this case, hydrogen is chemically bounded with sulfur to form a gaseous compound called hydrogen sulfide.

Answer:

D. hydrogen sulfide gas (H2S)

Explanation:

A compound is composed of two or more elements chemically bound together.

In this case, hydrogen is chemically bounded with sulfur to form a gaseous compound called hydrogen sulfide.

Read more on Brainly.com - https://brainly.com/question/12615069#readmore

Explanation:

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