CAN SOME PELASE PLEASE HLEP ME

If a solution is considered basic, then a) the hydroxide ion and hydronium ion concentrations are equal. b) the hydroxide ion concentration is less than the hydronium ion concentration. c) the hydronium ion concentration is greater than the hydroxide ion concentration. d) the hydroxide ion concentration is greater than the hydronium ion concentration.

Calculate the mass of silver needed to react with chlorine to produce 126g if silver chloride?

How have the greenhouse gasses increased from the year 2000 to 2018