In 0.300 mol of dimethylhydrazine,(CH₃)₂N₂H₂,there are A)1.81 × 10²⁴ molecules. B)2.51 × 10²³ atoms. C)1.81 × 10²² molecules. D)2.17 × 10²⁴ atoms. E)1.08 × 10²⁴ atoms.

Question

Quizplus · Accepted Answer

To determine the number of atoms in 0.300 mol of dimethylhydrazine, we first need to calculate the total number of molecules using Avogadro's number:

0.300 mol x (6.022 x 10^23 molecules/mol) = 1.81 x 10^23 molecules

Next, we can use the molecular formula to determine the number of atoms in each molecule of dimethylhydrazine:

1 carbon x 2 = 2 carbon atoms
6 hydrogen x 2 = 12 hydrogen atoms
2 nitrogen x 2 = 4 nitrogen atoms

Total atoms per molecule = 18

Finally, we can multiply the total number of molecules by the number of atoms per molecule to get the total number of atoms:

1.81 x 10^23 molecules x 18 atoms/molecule = 3.26 x 10^24 atoms

Therefore, the best choice is D, with 2.17 x 10^24 atoms being an incorrect option.

In 0.300 Mol of Dimethylhydrazine,(CH3)2N2H2,there Are

In 0.300 Mol of Dimethylhydrazine,(CH₃)₂N₂H₂,there Are