Multiple Choice
Approximately how many particles are present in 2 moles of a substance?
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2. Atoms & Elements
Mole Concept
Multiple Choice
What is the total number of moles of NaCl(s) required to prepare 3.0 liters of a 2.0 M NaCl solution?
A
1.5 moles
B
0.67 moles
C
2.0 moles
D
6.0 moles
Verified step by step guidance1
Recall that molarity (M) is defined as the number of moles of solute per liter of solution. The formula is \(M = \frac{\text{moles of solute}}{\text{liters of solution}}\).
Identify the given values: the molarity \(M = 2.0\,M\) and the volume of the solution \(V = 3.0\,L\).
Rearrange the molarity formula to solve for moles of solute: \(\text{moles of solute} = M \times V\).
Substitute the known values into the equation: \(\text{moles of NaCl} = 2.0\,M \times 3.0\,L\).
Calculate the product to find the total moles of NaCl required to prepare the solution.
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