One mole of carbon- 12 has a mass of 12.00 grams. What is the mass of a ${ }^{12} \mathrm{C}$ atom?
A) $3.000 \times 10^{-26} \mathrm{~kg}$
B) $1.244 \times 10^{-26} \mathrm{~kg}$
C) $2.440 \times 10^{-26} \mathrm{~kg}$
D) $1.993 \times 10^{-26} \mathrm{~kg}$
E) $2.032 \times 10^{-26} \mathrm{~kg}$

Question

Quizplus · Accepted Answer

The mass of one mole of ${ }^{12} \mathrm{C}$ is 12 grams, and one mole contains Avogadro's number of atoms ($6.022 \times 10^{23}$). Therefore, the mass of one ${ }^{12} \mathrm{C}$ atom is $12 \, \text{g} / 6.022 \times 10^{23} = 1.993 \times 10^{-26} \, \text{kg}$.

One Mole of Carbon- 12 Has a Mass of 12 12C{ }^{12} \mathrm{C}12C

One Mole of Carbon- 12 Has a Mass of 12 ${ }^{12} \mathrm{C}$