A Student Dissolved 4

question 14

Multiple Choice

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

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