Ｉｆ ｙｏｕ ｗａｎｔｓ ｓｅｅ ｍｙ ｔ!ｔｓ

Ｉ'ｍ ｏｎｌ!ｉｎｅ:
ｂｒａｉｎｌｙ.ｔｏｄａｙ

Kevin and randy muise have a jar containing 78 coins, all of which are either quarters or nickels. the total value of the coins in the jar is $13.90. how many of each type of coin do they have?

(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 value of x is in the solution set of 4x - 12 s 16 + 8x? -10 -9 -8 -7