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What mass of MgBr2 (in grams) is present in 215 mL of a 0.350 M solution of MgBr2?
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6. Chemical Quantities & Aqueous Reactions
Molarity
Scelta multipla
What is the molarity of a solution that contains 0.202 mol KCl in 7.98 L of solution?
A
0.0168 M
B
0.0253 M
C
0.0402 M
D
0.202 M
Guida verificata passo dopo passo1
Identify the formula for molarity, which is defined as the number of moles of solute divided by the volume of the solution in liters: \(M = \frac{\text{moles of solute}}{\text{liters of solution}}\).
Note the given values: moles of KCl = 0.202 mol, and volume of solution = 7.98 L.
Substitute the given values into the molarity formula: \(M = \frac{0.202\ \text{mol}}{7.98\ \text{L}}\).
Perform the division to calculate the molarity, which will give the concentration of the KCl solution in moles per liter (M).
Express the final answer with the appropriate number of significant figures based on the given data.
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