calculate the mass of 12.044*10^23 molecules of oxygen
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Explanation: 1 molecule of oxygen has a mass of 32g and it contains 6.023*10^23 molecules
Therefore, 32g————>6.023*10^23
X——————>12.044*10^23
X= 12.044*10^23 * 32/ 6.023 * 10^23
X= 2*32 => X= 64g
Therefore the mass of 12.044*10^23 molecules of O2 is 64 grams
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