Match these items.
1. h-cc-h (name)
2. cyclic compound with both saturated and unsaturated characteristics
3. cnh2n
4. reaction typical of unsaturated hydrocarbons
5. cnh2n-2
6. series name of hydrocarbons with triple bond
7. cnh2n+2
a. addition
b. general formula of alkanes
c. ethyne
d. alkyne
e. general formula for alkenes
f. general formula for alkynes
g. benzene

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer

15. which of the following is not human-caused groundwater pollution? a. water in an aquifer dissolves elements such as arsenic and mercury from surrounding rock. b. water in an aquifer is contaminated by leachate that seeps into the ground from a landfill. c. water in an aquifer becomes polluted with chemicals used in hydraulic fracturing, or fracking. d. water in an aquifer absorbs harmful bacteria from the drainage field of a septic tank.

What is the molarity of the solution produced when 145 g of nacl is dissolved in sufficient water to prepare 2.75 l of solution?