化学の質問ソリューション

A sample of tap water consists of water, fluoride ions, calcium ions, and several other dissolved ions. The ions are evenly distributed throughout the water. Which term or terms could be used to describe this sample of tap water?
Mixtures, Solutions, Pure Chemical Substances, Compounds, and Elements
A sample is composed completely of gold, absolutely free of impurities. Which term or terms could be used to describe this sample?
Mixtures, Solutions, Pure Chemical Substances, Compounds, and Elements
A blood sample contains several different types of cells, each of which contains different combinations of specific ions and molecules. The cells are suspended in water, and the water also contains many molecules and ions. Which term or terms could be used to describe this sample?
Mixtures, Solutions, Pure Chemical Substances, Compounds, and Elements
A balloon is filled with pure carbon dioxide. Which term or terms could be used to describe the contents of this balloon?
Mixtures, Solutions, Pure Chemical Substances, Compounds, and Elements