In a office block of 960 employees 640 drive to work what fraction of employees drive give your answer a fraction in its lowest terms

(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 ?

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

Evaluate the expression. (9 + 5)(3 + 2)0