Question

12.8g SO2 in given find
1. no. of molecules of SO2
2.no. of moles of SO2
3.no. of atoms
4.no. of S atom
5.no.of O atom
6. no.of O molecules
​​

Answer 1

Answer:

Molar mass of SO2 = 64 g/mol

Now, given mass = 8 g

1. We know,

Number of molecules = (Given mass)/(Molar mass) × Avogadro constant or N_o

=> Number of molecules = 8/64 × 6.022 × 10²³

=> Number of molecules = 1/8 × 6.022 × 10 = 7.5275 × 10²².

2. Number of Moles = (Given mass)/(Molar mass) = 1/8 moles

3. Number of atoms = (Number of atoms in one molecule)(Number of molecules)

=> Number of atoms = (3)(7.5275 × 10²²) = 22.5825 × 10²² = 2.25825 × 10²³.

4. Number of S atoms = (Number of S atom(s) in one SO2 molecule)(Number of molecules)

=> Number of S atoms = (1)(7.5275 × 10²²) = 7.5275 × 10²².

5. Number of O atoms = (Number of atoms in O2 molecule)(Number of molecules)

=> Number of O atoms = 2(7.5275 × 10²²) = 1.5055 × 10²³

6. Number of O molecules = 7.5275 × 10²².