The number of hydrogen atoms in 0.050 mol of C₃H₈O₃ is A)3.0 $\times$ 10²² H atoms B)1.2 $\times$ 10²³ H atoms C)2.4 $\times$ 10²³ H atoms D)4.8 $\times$ 10²³ H atoms E)none of these choices is correct

Question

Quizplus · Accepted Answer

From the chemical formula, we can see that there are 13 carbon atoms and 32 hydrogen atoms in one molecule of C₃H₈O₃. To find the number of hydrogen atoms in 0.050 mol, we can use Avogadro's number: 0.050 mol x (6.022 x 10^23 molecules/mol) x 32 H atoms/molecule = 9.67 x 10^22 H atoms Rounding to two significant figures, the answer is 2.4 x 10^10, which corresponds to choice C.

The Number of Hydrogen Atoms in 0 ×\times× 1022 H Atoms B)1

The Number of Hydrogen Atoms in 0 $\times$ 10²² H Atoms
B)1