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it depends on the volume of water but say for example you had a 250ml of water. this = 250grams. according to your Periodic Table if you add 2 hydrogen and 1 oxygen you get a molar mass (molar mass is the mass of one mole of particles = 6.02 x 10^23) of 1.008+1.008+16=18.016 therefore the one mole or 6.02x10^23 water molecules = 18.016 grams. if we divide 250/18.016 we get 13.878 moles or 13.878 x 6.02x10^23 which finally equals the number of water molecules which equals 8.35x10^24 molecules of water in a 250 ml glass o' water. without scientific notation this equals 8350000000000000000000000 molecules of water

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15y ago
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12y ago

According to Wolfram Alpha, there are 237 grams of H2O (l) in one cup of water. There is no way you can answer this problem without that value given to you (or you measure it manually). So now we just have simple stoichiometry:

237 g H2O * 18.0153 g/mol H2O = 4269.6261 mol H2O

4269.6261 mol H2O * 6.022*10^23 molecules/mol = 2.57116883742*10^27 molecules per glass of water

We are using exact, non-measured values here. So I'm not sure about significant figures.

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13y ago

there are more atoms in a glass of water than grains of sand in the world

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9y ago

Water has the chemical formula of H2O. It is composed of two hydrogen atoms and 1 oxygen atom that are joined by hydrogen bonds.

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6y ago

That depends on the size/volume of the glass of water. Obviously, a large glass of water will have more atoms than a small glass of water.

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13y ago

1 in 500,000,000

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14y ago

about 8.275 multiply by exponent 24 ....

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11y ago

69 x

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Q: How many atoms are in a glass of water?
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