Question

Which contains more molecules, 1.00 mol `H_2O_2`, 1.00 mol `C_2H_6`, or 1.00 mol `CO`?

Answer 1

`6.022xx10^23` molecules.

Explanation:

The number of molecules in a mole is constant and is equal to Avogadro's number : `6.022xx10^23`.

Therefore, 1.00 mol of `H_2O_2` or 1.00 mol of `C_2H_6` or 1.00 mol `CO` all contain the same number of molecules which is `6.022xx10^23` molecules.