how many molecules of oxygen are in water?
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If we want to make 5 molecules of water, we need 10 hydrogen atoms and 5 oxygen atoms. The ratio of atoms we will need to make any number of water molecules is the same: 2 hydrogen atoms to 1 oxygen atom.
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Molecules of compounds For example, water is a compound of hydrogen and oxygen. Each water molecule contains two hydrogen atoms and one oxygen atom. We show this in its chemical formula, H 2O.
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For example, since one atom of oxygen will combine with two atoms of hydrogen to create one molecule of water (H2O), one mole of oxygen (6.022 × 1023 of O atoms) will combine with two moles of hydrogen (2 × 6.022 × 1023 of H atoms) to make one mole of H2O.
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H2O is a molecule made of H for hydrogen and O for oxygen. There are 12 of these molecules. The smaller number is the number of atoms of the element to the left of it.
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One mole of oxygen gas, which has the formula O2, has a mass of 32 g and contains 6.02 X 1023 molecules of oxygen but 12.04 X 1023 (2 X 6.02 X 1023) atoms, because each molecule of oxygen contains two oxygen atoms.
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You have 3 moles, so there are 3×6.022×1023 oxygen molecules .
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Water consists of 2 hydrogen atoms and 1 oxygen atom. Each hydrogen atom has 1 proton, no neutrons (assume all H are protonium) and 1 electron. The oxygen atom has 8 protons, 8 neutrons (most abundant isotope) and 8 electrons.
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The chemical formula for water is H2O which means that every molecule of water has 2 atoms of hydrogen (H) and one atom of oxygen (O). Here comes the key part.
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Using Avogrado's Number Avogadro's number tells us there are 6.022 x 1023 molecules of water per mole of water. So, next we calculate how many molecules there are in a drop of water, which we determined contains 0.002775 moles: molecules in a drop of water = (6.022 x 1023 molecules/mole) x 0.002275 moles.
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So, 2moles of O2 contains 2× 6.023×10^23 molecule= 12.046 ×10^23 molecule . Now, 1 molecule of oxygen contains 2 atoms. Hence, 2mole of O2 contains 2 ×2 ×6.023 ×10^23 atoms = 24. 092 ×10^23 atoms.
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To calculate the number of molecules and atoms in a water drop, you need to know the chemical formula of water. There are two atoms of hydrogen and one atom of oxygen in each water molecule, making the formula H2O. So, each molecule of water contains 3 atoms.
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Dissolved Oxygen and Water. Although water molecules contain an oxygen atom, this oxygen is not what is needed by aquatic organisms living in natural waters. A small amount of oxygen, up to about ten molecules of oxygen per million of water, is actually dissolved in water.
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How many water molecules are produced when 5.2 g O2are reacted? 5.2 g O2* 1 mol O2* 2 mol H2O* 6.02 *1023molecules H2O= 1.96 * 1023molecules H2O32 g O21 mol O21 mol H2O 32.
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Avogadro's number tells us there are 6.022 x 1023 molecules of water per mole of water.
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A mole of water is about 18 grams. A water molecule contains one oxygen atom and two hydrogen atoms. Considering an oxygen atom is sixteen times heavier than a hydrogen atom, 1 mole of water has roughly 2 grams of hydrogen. This is just an estimate from high school level chemistry.
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= N•/2 number of oxygen molecules. = 6.022 * 10^22. = 3.011 * 10^22 molecules.
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of molecules is 20* 6.022* 10^ 23. One molecules of water contains 3 atoms. So in total, number of atoms = 3*20*6.022*10^23.