how many grams of h2o are present in 0.25 mole of it?
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1 mole of water weighs equal to the molecular mass of water. Thus the amount of present in 0.25 mole of it​ is 4.5 grams.
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Therefore 2 mole H2O will have 2.4088×10^24 hydrogen atoms. Since one mole is defined as 6.022 x 10^23, and there are two hydrogen per molecule, that would mean that there are exactly 12.044 x 10^23 molecules of hydrogen in one mole of water.
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Answer and Explanation: There are 4 moles of hydrogen atoms in 36 grams of water, which is choice a.
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So, if one mole has a mass of 18 grams, 25 grams would have a mass of 25 grams/ 18 grams per mole or 1.39 moles.
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Thus there are 2.77 moles of hydrogen in 25 g of water.
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We find moles of water. All you have to do is just divide 75 by 18 and you'll get 4.17 moles of H2O. That is the final answer.
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Answer and Explanation: The number of molecules of water in one mole of H2 O is 6.022140857 X 1023. This is because one mole contains 6.022140857 X 1023 particles or basic...
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['If 1 mole of HCl or NaOH gives you 1 mole of H2O , then the number of moles in H2O is: [ 1÷1×1 ] = 1 mole.', 'Now you have to find out the molar mass (M) of water ( H2O ). ... ', 'Therefore the molar mass (M) of H2O is: ... ', 'Last step, find the mass (m) of water.']
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There are two hydrogen atoms per water molecule. There are 6.022x10^23 water molecules per mole. To calculate for 5 moles, (2 H atom)/(H2O molecule) X (6.022x10^23 H2O molecules)/(mole) X 5 moles = 6.022x10^24.
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Part 1. There are 4 moles of hydrogen atoms in 36 grams of water, which is choice a.
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1 mole = 6.022×10^23 atoms. 1 water molecule = 2 Hydrogen atoms + 1 oxygen atom. So, 1 mole H2O = 1.2044×10^24 hydrogen atoms.
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Hydrogen has an atomic weight of 1; and oxygen has an atomic weight of 16 (check the periodic table for the atomic weights). So, one mole of water has a mass of 16 +1+1 = 18 grams. So, if one mole has a mass of 18 grams, 25 grams would have a mass of 25 grams/ 18 grams per mole or 1.39 moles.
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Answer and Explanation: There are 2.342558 X 1024 molecules of water in a 75.0-gram sample of H2 O.
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There are 16 grams of oxygen in 18 grams of water. We can see from the formula for water, H2O, there are twice as many hydrogen atoms (each of atomic mass 1) as oxygen atoms (each of atomic mass 16).
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1/18 = 0.056 moles of water molecules in 1 gram of water. The molecular formula of water is H_2O so there are two hydrogen atoms per one water molecule.
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9 grams of water is 1/2 mole which is… 3.012 x 10^23 molecules. For the numbet of atoms in 9 grams of H2O, multiply by three.
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You can view more details on each measurement unit: molecular weight of Water or grams The molecular formula for Water is H2O. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Water, or 18.01528 grams.