객관식
How many atoms are present in 5.80 moles of He?
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2. Atoms & Elements
Mole Concept
Multiple Choice
How many moles of sodium atoms are present in 3.60 × 10^{26} sodium atoms?
A
6.02 moles
B
60.0 moles
C
2.17 × 10^{25} moles
D
598 moles
검증된 단계별 안내1
Identify the given quantity: the number of sodium atoms is \(3.60 \times 10^{26}\) atoms.
Recall Avogadro's number, which is the number of atoms in one mole: \(6.022 \times 10^{23}\) atoms/mole.
Set up the conversion to find moles from atoms using the formula: \(\text{moles} = \frac{\text{number of atoms}}{\text{Avogadro's number}}\).
Substitute the values into the formula: \(\text{moles} = \frac{3.60 \times 10^{26}}{6.022 \times 10^{23}}\).
Perform the division to find the number of moles of sodium atoms.
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