1. .50 ml of a solution are diluted to a volume of 100 ml. The concentration of the diluted solution is 2 M. What was the concentration of the original solution? 4. .500 ml of a 5 M solution are diluted to 2 L. what is the concentration of the resulting solution?

6. Calculate the volume of concentrated reagent required to prepare the diluted solutions indicated:
A. 12 M HC1 to prepare 400. mL of 6.0 MHC1
B. 16 M HNO3 to prepare 100. mL of 2.5 M HNO3

PLS ANSWER ASAP