We’re being asked to identify which of the given is/are mixture(s).
Recall that mixtures are combinations of two or more pure substances (elements or compounds).
Mixtures are not chemically combined.
Mixtures can either be:
• Homogeneous: the components are evenly distributed and indistinguishable from each other
• Heterogenous: the components are not evenly distributed and distinguishable from each other
Which of the following are mixtures? Check all that apply.
a) salt water
b) water (H2O)
c) salt (NaCl)
d) air (mostly N2 and O2)
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