객관식
What is the mass of one mole of sodium chloride, , to the nearest tenth of a gram?
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2. Atoms & Elements
Calculating Molar Mass
객관식
What is the molar mass of diazepam also known as Valium if 0.05570 mol weighs 15.86 g?
A
220.1 g/mol
B
241.4 g/mol
C
263.9 g/mol
D
284.7 g/mol
검증된 단계별 안내1
Start by understanding the concept of molar mass, which is the mass of one mole of a substance, typically expressed in grams per mole (g/mol).
Use the formula for molar mass: \( \text{Molar Mass} = \frac{\text{Mass}}{\text{Moles}} \). This formula relates the mass of a sample to the number of moles of the substance.
Identify the given values in the problem: the mass of diazepam is 15.86 g, and the number of moles is 0.05570 mol.
Substitute the given values into the molar mass formula: \( \text{Molar Mass} = \frac{15.86 \text{ g}}{0.05570 \text{ mol}} \).
Perform the division to calculate the molar mass, ensuring that the units are consistent and the calculation is accurate.
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