Question

find the number and mass of neutrons in 32 gram of oxygen at STP (mass of neutron equal to 1.675 into 10 to the power minus 27 kilogram)​

Answer 1

Answer:

Total number of neutrons in 32 gram of O₂ = 9.6368 × 10²⁴

Total mass of neutrons in 32 gram of O₂ = 16.14164 gram

Explanation:

32 gram of O₂ = 1 mole of O₂

1 mole of O₂ contains 2 moles of oxygen ( O ) atoms

1 mole = 6.023 × 10²³

2 moles of oxygen atoms = 12.046 × 10²³ oxygen atoms.

Each oxygen atom contains 8 neutrons.

so total neutrons in 32 gram of O₂ = 8 × 12.046 × 10²³

                                                          = 9.6368 × 10²⁴ neutrons.

total mass of neutrons = 1.675 × 10⁻²⁷ × 9.6368 × 10²⁴ Kg .

                                      = 1.614164 × 10⁻² Kg

                                      = 16.14164 gram