Scelta multipla
Given a 10.0 g sample of O_2 gas, what is the molar mass of oxygen (O_2)?
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2. Atoms & Elements
Calculating Molar Mass
Scelta multipla
Which of the following is the mass of one mole of carbon atoms?
A
12.01 g
B
6.02 g
C
24.02 g
D
1.01 g
Guida verificata passo dopo passo1
Understand that the mass of one mole of an element is called its molar mass, which is numerically equal to the element's atomic mass in atomic mass units (amu) but expressed in grams per mole (g/mol).
Look up the atomic mass of carbon on the periodic table, which is approximately 12.01 amu.
Recognize that this atomic mass value corresponds to the mass of one mole of carbon atoms, so the molar mass of carbon is 12.01 g/mol.
Compare the given options to the molar mass of carbon; the correct mass of one mole of carbon atoms should match the atomic mass value expressed in grams.
Conclude that the correct answer is the option closest to 12.01 g, which represents the mass of one mole of carbon atoms.
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