Multiple Choice 1 Which describes how mixtures differ from
Mixtures are homogeneous
# Mixtures are liquids.
C Mixtures can be separated physically,
D Mixtures contain only one kind
of atom

Write the empirical chemical formula of calcium with a mass percent of 38.8, phosphorus with a mass percent of 20.0, and oxygen with a mass percent of 41.3.

In a copper wire, a temperature increase is the result of which of the following

Which of the following is most likely true about water in chemical systems? a) water dissolves nonpolar ionic compounds. b) water dissociates ionic compounds. c) water dissociates covalent molecules. d) water dissolves nonpolar covalent substances.