Choose the true statement(s) about biochemical tests. select all true statements, as there may be more than one correct answer. a. the gram stain is an example of a biochemical test. b. a biochemical test can detect what enzymes a bacterium makes. c. biochemical tests are only performed on pathogens. d. a biochemical test may detect intermediates or end-products in a pathway.

Cryolite, na3alf6(s), an ore used in the production of aluminum, can be synthesized using aluminum oxide. start this question by first balance the chemical equation.1.) balance the equation: - alo3(s)+naoh(l)+hf(> na3alf6+h2o(g). 2.) if 17.5 kilograms of al2o3(s), 51.4 kilograms of naoh(l), and 51.4 kilograms of hf(g) react completely, how many kilograms of cryolite will be produced? 3.)which reactants will be in excess, (al2o3, naoh, or hf) 4.)what is the total mass of the excess reactants left over after the reaction is complete in kg?