Molarity of HCl

What is the molarity of a solution containing 8.00 g NaCl in 500.0 mL?

What is the molarity of a solution made by dissolving 1.461 g of NaCl in 250.0 mL of water? (MM of NaCl = 58.443 g/mol)

How many grams of AgNO$_3$ are needed to prepare 250 mL of 0.0125 M AgNO$_3$? (MM of AgNO$_3$ = 169.87 g/mol)

How could 100 mL of 0.125 M H$_2$SO$_4$ solution be made from 0.500 M H$_2$SO$_4$ solution?