On a map. 1 cm = 6 miles. If a distance is 21 miles away, how many centimeters on the map would it appear?

(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 size of the matrix resulting from

Brent wants to know what is 5 x 1/2