객관식
How many atoms are present in 12 grams of carbon-12?
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2. Atoms & Elements
Mole Concept
객관식
Based on the data provided in Table 1, which item contains the largest quantity of moles?
A
32 g of O2
B
18 g of H2O
C
22 g of CO2
D
10 g of H2O
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검증된 단계별 안내1
Identify the molar mass of each substance using the periodic table: calculate the molar mass of O\_2, H\_2O, and CO\_2 by summing the atomic masses of their constituent atoms.
Use the formula for moles: \(\text{moles} = \frac{\text{mass (g)}}{\text{molar mass (g/mol)}}\) to calculate the number of moles for each given mass of the substances.
Calculate the moles for 32 g of O\_2 by dividing 32 g by the molar mass of O\_2.
Calculate the moles for 18 g of H\_2O by dividing 18 g by the molar mass of H\_2O.
Calculate the moles for 22 g of CO\_2 and 10 g of H\_2O similarly, then compare all the mole values to determine which item contains the largest quantity of moles.
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