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The number of molecules is 2,35.10e23.
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∙ 8y ago
The molar mass of water (H2O) is approximately 18 g/mol. To calculate the number of molecules in 12.5 g of water, we need to convert grams to moles by dividing by the molar mass. 12.5 g / 18 g/mol = 0.694 moles.
Since 1 mole of any substance contains 6.022 x 10^23 molecules (Avogadro's number), multiplying 0.694 moles by Avogadro's number gives us approximately 4.18 x 10^23 molecules of water in 12.5 g.
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