Answer these two questions. 1. how meant different atoms do we know of?

2. what are all the characteristics of a physical property? (there’s 7)

Enough of a monoprotic weak acid is dissolved in water to produce a 0.0172 m solution. if the ph of the resulting solution is 2.39 at 20 °c, determine the pka for the acid.

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.

Which of the following is not one of the steps in the scientific method a. hypothesize b. summarize c. analyze d. familiarize