Scelta multipla
Which value represents the number of particles in 1 mol of a substance?
121
views
2. Atoms & Elements
Mole Concept
Scelta multipla
How many moles of KNO3 are present in 500.0 mL of a 2.0 M KNO3 solution?
A
1.0 mol
B
0.25 mol
C
0.5 mol
D
2.0 mol
Guida verificata passo dopo passo1
Identify the given information: the volume of the solution is 500.0 mL and the molarity (M) of the KNO3 solution is 2.0 M.
Convert the volume from milliliters to liters because molarity is expressed in moles per liter. Use the conversion: \(1\, \text{L} = 1000\, \text{mL}\), so \(V = \frac{500.0}{1000} = 0.500\, \text{L}\).
Recall the definition of molarity: \(M = \frac{\text{moles of solute}}{\text{liters of solution}}\). Rearranged to find moles, it becomes \(\text{moles of solute} = M \times V\).
Substitute the known values into the equation: \(\text{moles of KNO}_3 = 2.0\, \text{M} \times 0.500\, \text{L}\).
Calculate the product to find the number of moles of KNO3 in the solution.
Video correlati
Pratica correlata
