[multiple choice] why do mixtures such as sugar and water lack a chemical formula? the elements are unknown. no chemical bonding took place between the ingredients. mixtures do not contain compounds. the elements or compounds in the mixtures have no definite proportions.

Graded assignment lab report answer the questions below. which combinations of substances resulted in a chemical change? for each metal that participated in a chemical change, write the type of metal it is, based on your examination of the periodic table. were there any metallic compounds that did not react with either the acid or the base? write the type of metal, based on your examination of the periodic table. make a general statement about the reactivity of the metals in this experiment.