About how many electrons are in 190 grams of water (H₂O)?

Name: About how many electrons are in 190 grams of water (H 2 O)?
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Quizplus · Accepted Answer

Water (H2O) has 10 electrons per molecule. The molar mass of water is 18 g/mol, so 190 g of water is approximately 10.56 moles. Avogadro's number (6.022 x 10^23) gives the number of molecules per mole, so 10.56 moles of water contains about 6.35 x 10^24 molecules. Multiplying by 10 electrons per molecule gives approximately 6.35 x 10^25 electrons, which is closest to 10^26.

About How Many Electrons Are in 190 Grams of Water