Determine the number of molecules contained in 66 g of carbon dioxide CO2.

Find the amount of substance n
Mass / molar mass (equal to the relative molecular mass)
66/44 = 1.5 mol
The number of molecules is equal to the number of avogadro * the amount of substance
6 * 10 ^ 23 particles / mol * 1.5 = 9 * 10 ^ 23 molecules.
Answer: 9 * 10 ^ 23 molecules.



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