Classify the following as an element, compound, homogeneous mixture, or heterogeneous mixture: iron (Fe) A. Element
B. Compound
C. Homogenous mixture
D. Heterogenous mixture

Calculate the mass of silver needed to react with chlorine to produce 126g if silver chloride?

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.

Which polymers are most closely related? a. protein and nucleic acids b. cellulose and starch c. nucleic acids and starch d. nucleic acids and cellulose