How many molecules are in 12.2 g NO2?
Answer in units of molec
Someone answer the question.
To determine the number of molecules in 12.2 g of NO2, we need to use the concept of moles and Avogadro's number.
1. Start by calculating the number of moles of NO2:
- The molar mass of NO2 can be obtained by adding the atomic masses of nitrogen (N) and two oxygen (O) atoms, which are 14.01 g/mol and 16 g/mol respectively.
Molar mass of NO2 = 14.01 g/mol + 2 * 16 g/mol = 46.01 g/mol
- To find the number of moles, divide the given mass by the molar mass:
Number of moles = Mass of NO2 / Molar mass of NO2 = 12.2 g / 46.01 g/mol ≈ 0.265 mol
2. Next, use Avogadro's number to convert moles to molecules:
- Avogadro's number is approximately 6.022 x 10^23 molecules/mol.
- Multiply the number of moles by Avogadro's number to get the number of molecules:
Number of molecules = Number of moles * Avogadro's number
Number of molecules = 0.265 mol * 6.022 x 10^23 molecules/mol ≈ 1.595 x 10^23 molecules
Therefore, there are approximately 1.595 x 10^23 molecules in 12.2 g of NO2.
mol NO2 = 12.2/molar mass NO2
mols x 6.022E23 = # molecules.