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Which of these substances are compounds? How do you know? A. Salt (NaCl) B. Nitrogen (N) C. Helium (He) D. Water (H2O)

Which of these substances are compounds? How do you know? A. Salt (NaCl) B. Nitrogen (N) C. Helium (He) D. Water (H2O)
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Which of these substances are compounds? How do you know?

A. Salt (NaCl)
B. Nitrogen (N)
C. Helium (He)
D. Water (H2O)

asked
User Bchhun
by
8.5k points

1 Answer

2 votes
Salt because it's a solid and helium and nitrogen are gases.
Water is a liquid because it's form can change.
answered
User Jesus Fernandez
by
8.1k points
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