Question

how many atoms of oxygen are present in 4.4 g of carbon dioxide

Answer 1

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$\mathfrak{\green{Answer.}}$44 grams CO2 mean 44/44=1 mole of the CO2. 1 mole CO2 implies total of 6.022 * 10^23 molecules of CO2. 1 molecule of CO2 has 3 atoms, therefore total atoms in 44 grams of CO2 has (6.022*10^23) * 3 = 18.066* 10^23 atoms.
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