In the amino acid formula, what does the "r-" represent? a halogen a hydroxyl group an alkyl group an oxyacid

If equal masses of the listed metals were collected , which would have a greatest volume ? a. aluminum 2.70,b. zinc7.14,c. copper 8.92,d. lead 11.34

Voltaic cells produce a positive overall charge. what does this indicate? a. the reaction is likely to be endothermic. b. the reaction is spontaneous. c. the reaction is not likely to occur. d. the reaction is not spontaneous.

What are the chemical names of these compounds? ke: mg3n2: reset next