Multiple Choice
What is the approximate combined mole fraction of N_2 and O_2 in Earth's atmosphere?
2. Atoms & Elements
Mole Concept
Multiple Choice
How many moles of cyclohexanone (molar mass = 98 g/mol) are present in a sample containing 147 g of cyclohexanone?
A
1.50 mol
B
1.50 mol
C
1.00 mol
D
1.50 mol
Verified step by step guidance1
Identify the given information: the mass of cyclohexanone is 147 g, and its molar mass is 98 g/mol.
Recall the formula to calculate moles from mass and molar mass: \(\text{moles} = \frac{\text{mass (g)}}{\text{molar mass (g/mol)}}\).
Substitute the given values into the formula: \(\text{moles} = \frac{147}{98}\).
Perform the division to find the number of moles (do not calculate the final value here, just set up the expression).
Interpret the result as the amount of cyclohexanone in moles present in the sample.
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