Question

calculate the number of particles in 8 gram of O2 molecules

Answer 1

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8g of O2 moles
molecular mass of O2=32u
No. Of  molecules in O2 molecules=(8/32) x 6.022 x 10²³⇒0.25 x 6.023 x 10 ²³
⇒1.5055x 10 ²³ molecules

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Answer 2

molar mass of oxygen gas = 32g

no. of moles in 8g = 8/32 = 0.25 moles

no. of particles(molecules) = 0.25 * 6.02 * 10^23 = 1.5 * 10^23

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