객관식
If we compare a mole of carbon atoms to a mole of oxygen atoms, which of the following statements is true?
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2. Atoms & Elements
Mole Concept
객관식
How many moles are present in 3.01 × 10^{23} molecules of H_2O?
A
0.25 moles
B
2 moles
C
0.5 moles
D
1 mole
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검증된 단계별 안내1
Identify the given quantity: 3.01 \(\times\) 10^{23} molecules of H_2O.
Recall Avogadro's number, which is the number of molecules in one mole: 6.02 \(\times\) 10^{23} molecules/mole.
Set up the conversion to find moles from molecules using the formula: \(\text{moles} = \frac{\text{number of molecules}}{\text{Avogadro's number}}\).
Substitute the values into the formula: \(\text{moles} = \frac{3.01 \times 10^{23}}{6.02 \times 10^{23}}\).
Simplify the fraction to find the number of moles present in the given molecules.
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