Section 1
Classification of Matter
Classify each of the following pure substances as an element or a compound:a. $\mathrm{Al}_{2} \mathrm{O}_{3}$ (aluminum oxide)b. $\mathrm{Li}$ (lithium)c. $\mathrm{NH}_{4} \mathrm{OH}$ (ammoniumd. glucose $\left(\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}\right)$ hydroxide)e. $\mathrm{P}$ (phosphorus)
Classify each of the following pure substances as an element or a compound:a. helium gas (He)b. sulfur (S)c. $\operatorname{sugar}\left(\mathrm{C}_{12} \mathrm{H}_{22} \mathrm{O}_{11}\right)$d. mercury (Hg) in a thermometere. lye (NaOH)
Classify each of the following as a pure substance or a mixture:a. Distilled waterb. Dry icec. Fruit custardd. Irone. Trimix (oxygen, helium, nitrogen) in a scuba tank
Classify each of the following as a pure substance or a mixture:a. a soft drinkb. propane $\left(\mathrm{C}_{3} \mathrm{H}_{8}\right)$c. a cheese sandwichd. an iron (Fe) naile. salt substitute (KCl)
Classify each of the following mixtures as homogeneous or heterogeneous.a. sugar solutionb. aerated drinksc. sand in waterd. a mixed vegetable dishe. mango juice with mango slices
Classify each of the following mixtures as homogeneous or heterogeneous:a. brassb. chocolate-chip ice creamc. normal salined. peanut buttere. pulp in orange juice