mol of a solute is dissolved to make L of solution. What is the molarity (in mol/L)?
Answer and explanation
Correct answer: A. 4
- Step 1: Molarity is defined as the number of moles of solute dissolved per liter of solution: .
- Step 2: Substitute the quantity of solute and solution volume : .
- Step 3: Evaluating the fraction yields a concentration of .
Answer
4.
Why not the others: 1/4 inverts the molarity formula (); 5 adds moles and volume (); 8 adds rather than subtracts the constant term in the final step.
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