Does anybody know how to do this i am stuck and pls dont come on hear unless you actually care i dont want too be giving away free points but we are going to play xxx truth or dare

Asolution contains 225 g of sodium chloride, nacl, dissolved in enough water to make a 0.25 l of solution. what is the molarity of the solution?

How are isotopes of the same chemical element alike? how are they different?

Which statement is true about a catalyst? a: a catalyst decreases the rate of the reaction. b. a catalyst is consumed during a chemical reaction. c. a catalyst lowers the activation energy of a reaction. d. a catalyst increases the reactant concentration during a reaction.