how many grams of hydrogen atoms are in 1 gram of water?
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Roughly atoms. Water has a molecular mass of 18. 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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One MOLE of hydrogen atoms contains the same number of atoms as the number of hydrogen molecules in one MOLE of hydrogen molecules, i.e., Avagadros number. However, one mole of hydrogen atoms has a mass of 1 gram while one MOLE of hydrogen molecules has a mass of 2 grams.
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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.
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If we have one mole of water, then we know that it will have a mass of 2 grams (for 2 moles of H atoms) + 16 grams (for one mole O atom) = 18 grams.
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So the answer is 6.02 × 10²² atoms of hydrogen are contained in 1.50 gram of glucose.
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or 1 g of water contains (6.022 x 10^23)/ 18 water molecules and the number comes out to be 3.3455 x 10^22. So the number of water molecules present in 1 g of water is 3.3455 x 10^22.
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The average mass of one H2O molecule is 18.02 amu. The number of atoms is an exact number, the number of mole is an exact number; they do not affect the number of significant figures. The average mass of one mole of H2O is 18.02 grams. This is stated: the molar mass of water is 18.02 g/mol.
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Answer: There are 2.77 moles of hydrogen in 25 g of water.
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Water consists of two hydrogen atoms connected to one oxygen atom, therefore molecular mass of water (M) is equal to sum of molecular masses of oxygen and two hydrogen atoms which is 2x1. 01 +15.99. Therefore molecular mass of water (M) is equal to 18,01. So in 5g sample of water there is 1.67 x 1023 water molecules.
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(For the record, quantum effects play a large role as well.) 1. 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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How many atoms does one gram atom of an element contain? According to Avogadro's Constant 1 mole of a substance contains 6.022*10^23 molecules. 1 mole is equal to the atomic mass of a substance in grams.
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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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Water has a molar mass of 18.01528 g/mol≈18 g/mol . Since water has a chemical formula of H2O , there will be 2 moles of hydrogen in every mole of water.
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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 is equal to 1 moles Hydrogen, or 1.00794 grams.
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Another way to look at it is that the proportions of themass of hydrogen in a water molecule to the total mass of themolecule would be 2/18 . For 1.8 g of water this situation is equal to0. 2/1.8 , i.e . you need 0.2 g of hydrogen to produce 1.8 grams ofwater .
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Answer and Explanation: There are 4 moles of hydrogen atoms in 36 grams of water, which is choice a.