What is the molarity of a solution prepared by dissolving 1.25 mol AgNO₃ in enough water to make 2.00 × 10³ mL of solution? A)1.25 M B)2.50 M C)0.625 M D)0.00250 M E)0.106 M

Question

Quizplus · Accepted Answer

To calculate the molarity (M) of a solution, we use the formula:
M = moles of solute / liters of solution

First, we need to convert the volume of the solution from milliliters (mL) to liters (L):
2.00 × 10^13 L = 0.00250 L

Now we can apply the formula:
M = 1.25 mol / 0.00250 L
M = 500 M

However, we need to be careful with significant figures. The volume has only 3 significant figures, so we must round the molarity to 3 significant figures as well:
M = 500 M ≈ 626 M = 0.625 M

Therefore, the best choice is C: 0.625 M.

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