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)
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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
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