객관식
In an experiment, you added hydrochloric acid (HCl) to fully neutralize a solution of sodium carbonate (Na2CO3). If you started with 0.050 mol of Na2CO3, how many moles of HCl were required for complete neutralization?
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3. Chemical Reactions
Stoichiometry
Multiple Choice
What volume in mL of a 0.220 M HBr solution is required to provide 0.0150 moles of HBr?
A
68.2 mL
B
0.22 mL
C
15.0 mL
D
33.0 mL
검증된 단계별 안내1
Identify the known quantities: the molarity of the HBr solution (M) is 0.220 M, and the amount of HBr in moles (n) is 0.0150 moles.
Recall the definition of molarity, which relates moles of solute to volume of solution: \(M = \frac{n}{V}\), where \(V\) is the volume in liters.
Rearrange the molarity formula to solve for volume: \(V = \frac{n}{M}\).
Substitute the known values into the equation: \(V = \frac{0.0150\ \text{moles}}{0.220\ \text{mol/L}}\) to find the volume in liters.
Convert the volume from liters to milliliters by multiplying by 1000, since \(1\ \text{L} = 1000\ \text{mL}\).
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