Question

Propane is a gas used for cooking and heating. How many atoms are in 2.12 mol of propane (C₂H₂) Hint: 1 molecule C,H, 11 atoms (3 C and 8 H)​

Answer 1

Answer: 1.40299 × 10²⁵ atoms in 2.12 mol

Step-by-step explanation:

The chemical formula for propane is C₃H₈, not C₂H₂. Each molecule of propane contains 3 carbon atoms (C) and 8 hydrogen atoms (H). To determine the number of atoms in 2.12 mol of propane, we can use Avogadro's number, which states that there are 6.022 × 10²³ entities (atoms, molecules, ions, etc.) in 1 mole of a substance.

First, calculate the total number of molecules in 2.12 mol of propane by multiplying the number of moles by Avogadro's number:

2.12 mol x (6.022 × 10²³ molecules/mol) = 1.27544 × 10²⁴ molecules

Since each molecule of propane contains 11 atoms (3 carbon atoms + 8 hydrogen atoms), multiply the number of molecules by 11 to find the total number of atoms:

1.27544 × 10²⁴ molecules x 11 atoms/molecule = 1.40299 × 10²⁵ atoms

Therefore, there are approximately 1.40299 × 10²⁵ atoms in 2.12 mol of propane.

Answer 2

Step-by-step explanation:

First, let's determine the formula for propane. Propane has 3 carbon atoms and 8 hydrogen atoms.

CH₃CH₂CH₃

Second, use the number of moles of propane given in the problem (2.12 moles) and the formula for propane.

2.12 mol CH₃CH₂CH₃

Third, take 2.12 times the number of carbon atoms and the number of hydrogen atoms in propane.

There are 3 carbon atoms and 8 hydrogen atoms in propane.

2.12 x 3 carbon atoms = 6.36 carbon atoms

2.12 x 8 hydrogen atoms = 16.96 hydrogen atoms