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How many molecules are present in 23 moles of oxygen (O_2)?
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2. Atoms & Elements
Mole Concept
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How many moles are present in 22 grams of argon (Ar)? (Atomic mass of Ar = 39.95 g/mol)
A
0.25 moles
B
2.00 moles
C
1.00 moles
D
0.55 moles
Guida verificata passo dopo passo1
Identify the given information: mass of argon (Ar) is 22 grams, and the atomic mass of argon is 39.95 g/mol.
Recall the formula to calculate moles from mass: \(\text{moles} = \frac{\text{mass (g)}}{\text{molar mass (g/mol)}}\).
Substitute the given values into the formula: \(\text{moles} = \frac{22}{39.95}\).
Perform the division to find the number of moles of argon present in 22 grams.
Compare the calculated value with the provided options to identify the correct number of moles.
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