QQuestionChemistry
QuestionChemistry
The molar mass of KCl is 74.55 g/mol. If 8.45 g of KCl are dissolved in 0.750 L of solution, what is the molarity of the solution?
A. 0.113 M
B. 0.151 M
C. 6.62 M
D. 11.3 M
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Answer
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Step 1:I'll solve this step-by-step using precise LaTeX formatting:
Step 2:: Calculate the number of moles of KCl
• $$n = \frac{8.45 \,g}{74.55 \frac{g}{mol}} = 0.113 \,mol
• Mass of KCl = 8.45 g
Step 3:: Calculate molarity
• $$M = \frac{0.113 \,mol}{0.750 \,L} = 0.151 \,M
• Volume of solution = 0.750 L
Step 4:: Verify the calculation
• $$0.151 \,\frac{mol}{L} = 0.151 \,M
Final Answer
Key steps: - Converted mass to moles - Divided moles by solution volume - Calculated molarity precisely
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