WebHow many molecules of water, H2O, are present in 75.0 g of H2O? A) 7.53 × 1024 molecules B) 2.51 × 1024 molecules C) 75.0 molecules D) 5.02 × 1024 molecules E) 4.17 molecules B When an alpha particle is … WebAnswer (1 of 4): The molar mass of water is 18.02g/mol 50 grams of water contains 50g x 1 mole/18.02g moles of water 2.775 moles H2O 1 mole of H2O contains 6.022 x 10^23 molecules of water 2.775 moles of H2O contains 2.775 x 6.022 x 10^23 molecules of H2O = 1.6711 x 10^24 molecules of H2O 1...
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Web22 mrt. 2024 · angeltaneja. It is equal to Avogadro's number (NA), namely 6.022 x1023. 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. Since we only have 0.001 grams, that means that we have NA * (0.001/18) = 3.35*1019molecules of water! Web30 apr. 2024 · How many molecules are contained in 25.0 grams of water? Here we have 25.0 g/(18.0g/mole) = 1.39 moles water (3 sig figs). Multiply 1.39 moles times the definition of a mole to arrive at the actual number of water molecules: 1.39 (moles water) * 6.02 x 1023 molecules water/(mole water) = 8.36 x 1023 molecules water. highest savings interest rates 2022
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Web10 feb. 2012 · What is the number of grams of Hydrogen in 5.45 x 10^22 molecules NH3? If 75.0 grams of water is decomposed into hydrogen and oxygen, how many grams of hydrogen should be formed? How many moles of molecules are there in 250 grams of hydrogen nitrate? Are these correct? 1. Web27 jan. 2024 · Each mole of water contains 6.022×10 23 water molecules. So, the mass of a single water molecule is the molar mass (18.01 g/mol) divided by Avogadro’s number … Web10 feb. 2024 · Now, you know that in 105 g of methane there are 6.55 mol of methane. Next, you can make use of Avogadro's number to find the number of molecules of … highest savings interest rates in canada