Question

how many moles of O2 are there in 1.20*10^22 oxygen moleculea? ​

Answer 1

Answer:

2 moles.

Explanation:

1 mole of O₂ contains 6.023 * 10²³ molecules

x mole of O₂ contains 1.2 * 10²² molecules = 12 * 10²³ molecules

Just cross multiply.

x = 12 * 10²³ * 1 / 6.023 * 10²³ = 1.99 moles

x ≈ 2 moles.

∴ Two moles of oxygen contains ≈ 1.2 * 10²² Oxygen molecules.

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