객관식
Which of the following best describes the mass of 1 mol of atoms for an element?
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2. Atoms & Elements
Calculating Molar Mass
Multiple Choice
Given that the molar mass of H_2O is 18.02 g/mol, how many grams of H_2O are present in 0.20 mol?
A
3.60 g
B
9.01 g
C
0.90 g
D
36.04 g
검증된 단계별 안내1
Identify the given information: the molar mass of H\_2O is 18.02 g/mol, and the amount of substance is 0.20 mol.
Recall the relationship between mass, moles, and molar mass, which is given by the formula: \(\text{mass} = \text{moles} \times \text{molar mass}\).
Substitute the known values into the formula: \(\text{mass} = 0.20 \text{ mol} \times 18.02 \text{ g/mol}\).
Perform the multiplication to find the mass in grams (do not calculate the final number here, just set up the expression).
Interpret the result as the mass of H\_2O corresponding to 0.20 mol, which can then be compared to the given answer choices.
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