Please help, im having trouble with this a small waffle cone has a height of 6 inches and a diameter of 2.5 inches a large waffle cone has a height of 7.25 inches and a diameter of 3.25 inches. show how to find the difference in the volumes.

(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 ?

Can someone me with my hwplz(only the circled ones)

Aplane flies around trip to philadelphia it flies to philadelphia at 220 miles per hour and back home with a tailwind at 280 miles per hour if the total trip takes 6.5 hours how many miles does the plane fly round trip