A student dissolved 4.00 g of Co(NO3)2 in enough water to make ...

[Shelles]

A student dissolved 4.00 g of Co(NO3)2 in enough water to make 100. mL of stock solution. He took 4.00 mL of the stock solution and then diluted it with water to give 275. mL of a final solution.
 
  How many grams of NO3- ion are there in the final solution? A) 0.0197 g
  B) 0.0394 g
  C) 0.0542 g
  D) 0.108 g

Question 2

What is the concentration of an AlCl3 solution if 150. mL of the solution contains 450. mg of Cl- ion?
 
  A) 2.82  10-2 M
  B) 6.75  10-2 M
  C) 8.46  10-2 M
  D) 2.54  10-1 M

[carlsona147]

Answer to Question 1

D

Answer to Question 2

A

[Shelles]

TY

[carlsona147]

You're welcome