Need help with this please! I'm not sure if i did figure out the problem or I got it wrong. If someone could look over my problem on #1 that would be great and also help me answer number two! I'm terrible at answering questions like that. Thank you very much!!

Seltzer water is created by placing water under pressure with carbon dioxide gas. which of the following statements best describe seltzer water: a. the solution will be slightly acidic b. the solution will be slightly basic. the solution will be strongly acidic. d. the solution will be strongly basic. e. the solution will be neutral

The climate of the continental united states is generally 1. tropical 2. temperate 3. arctic 4. highland

How many moles of lead are in 1.50 x 10^12 atoms of lead? could you explain the answer as well and not just give it to me i am refreshing for finals and i need to know how to do it