Problem: Which of the following are mixtures? Check all that apply. (a) water (H2O) (b) salt (NaCl) (c) salt water (d) air (mostly N2 and O2)

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We’re being asked to identify the mixture/s among the given.

Recall that mixtures are combinations of two or more pure substances (elements or compounds)

Mixtures are not chemically combined.

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Problem Details

Which of the following are mixtures? Check all that apply. 

(a) water (H2O) 

(b) salt (NaCl) 

(c) salt water 

(d) air (mostly N2 and O2)

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