mol of a solute is dissolved to make L of solution. What is the molarity (in mol/L)?
Answer and explanation
Correct answer: A. 5/2
- Step 1: Recall the definition of molar concentration: , expressing moles of dissolved solute per volume in liters.
- Step 2: Plug in and to get .
- Step 3: Simplifying the ratio gives .
Answer
5/2.
Why not the others: 7 adds moles and volume (); 2/5 inverts the molarity formula (); 10 multiplies moles by volume ().
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