Which of the following is an oxidation reaction? a. aucl4- → aucl 2- b. mn7+ → mn2+ c. co3+ → co2+ d. cl2 → clo3-

Which is an example of the practical pursuit of alchemy? a. forming perfect substances. b. transforming base metals. c. developing metalworking techniques. d. linking spiritual characteristics with material substances.

Asubstance is a good conductor of electricity which of the following best explains a probable position of the substance in a periodic table

Which of the following are sources of revenue for media companies? a. direct sales to producers b.advertising and subscriptions c. online purchase d. capital investments