How many moles of oxygen molecules are there in 24 dm3 of air at r. t.p.? Assume air is 20% oxygen? What mass of sodium hydroxide is there in 35 cm3 of a 2 mol / dm3 solution of sodium hydroxide?
How many oxygen atoms are there in 4.9 g of H2SO4?
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You just calculated that the heat of fusion for chloromethane is 6400 j/mol. the heat of fusion for hydrogen is 120 j/mol.? which of the following account for this difference? more than one correcta. chloromethane can absorb more energy at the same temperature. b. hydrogen has stronger intermolecular forces than chloromethane. c. hydrogen molecules can pack more closely than chloromethane molecules. d. chloromethane experiences dipole-dipole interactions. e. chloromethane has a higher molar mass than hydrogen.