What is x? i need the answer asap.

(a) calculate the molarity of a solution that contains 0.0345 mol nh4cl in 400 ml of solution. (b) how many moles of hno3 are present in 35.0 ml of a 2.20 m solution of nitric acid? (c) how many milliliters of 1.50 m koh solution are needed to supply 0.125 mil of koh ?

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?

Hundred and tens tables to make 430 in five different ways