An item is regularly priced at $40. aldo bought it on sale for 85% off the regular price. how much did aldo pay?

(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 ?

What is the solution to the equation? k/6.4=8.7 2.3 5.568 15.1 55.68

Answer pls man im trying to get out of summer school