객관식
How many hydrogen atoms are present in 6.02 × 10^{23} molecules of H_2O?
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Mole Concept
객관식
How many moles are present in 199 grams of CCl_4?
A
2.00 moles
B
1.55 moles
C
1.30 moles
D
0.99 moles
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검증된 단계별 안내1
Identify the chemical formula of the compound, which is carbon tetrachloride, CCl\_4.
Calculate the molar mass of CCl\_4 by adding the atomic masses of one carbon atom and four chlorine atoms. Use the atomic masses: C = 12.01 g/mol, Cl = 35.45 g/mol.
Use the formula to find moles: \(\text{moles} = \frac{\text{mass (g)}}{\text{molar mass (g/mol)}}\).
Substitute the given mass (199 g) and the calculated molar mass of CCl\_4 into the formula.
Perform the division to find the number of moles present in 199 grams of CCl\_4.
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