Graph the system of inequalities y -1/3x-1

(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 ?

This question awards 100 ! i really don’t want to fail i will also mark you !

What percent of 18 is 24? and plz explain thx.