A Student Dissolved 5

question 207

Multiple Choice

A student dissolved 5.00 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 in the final solution?

• A) 0.0247 g
• B) 0.0493 g
• C) 0.0678 g
• D) 0.136 g

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