ASAP WILL GIVE BRAINLIEST!!
6. What is the molarity of a solution that is made by adding 145 g Na3PO4 to water to make 1.5 liters of solution?
7. How many moles of KBr are contained in a 480 mL of a solution of 0.75 M KBr?
8. What is the volume of a 1.4 M NaCl solution that contains 4.0 moles of NaCl?
9. What is the molarity of a solution made of water added to 45 g AgNO3 to produce 650 mL of solution?
10. A solution contains 40.0 g of hexane, 35.0 g of heptane and 25.0 g of benzene. What is the mole fraction of hexane? The molecular weights of these compounds are 86.18 g/mol for hexane, 100.21 g/mol for heptane, and 78.11 g/mol for benzene.
11. If a 1.25 M NaCl solution is diluted to produce 250 mL of a 0.50 M NaCl solution, what volume of the 1.25 M NaCl solution is needed to do this?
12. If the normality (N) of a 1.0 M solution of H2SO4 is 2.0 N because each H2SO4 produces 2 H+, and the normality of a 1.0M solution of H3PO4 is 3.0 N because each H3PO4 produces 3 H+, what is the normality of the sulfate (SO42-) in the first solution and that of the phosphate (PO43-) in the second case?