Facts about Revere. Revere is also known as: Revere. Revere is a city in Redwood County, Minnesota, United States. The population was 95 at the 2010 census. Population shifts in Revere; Average temperatures in Revere Line in orange is average highs...line in blue is average lows. Average rainfall in Revere
Determine the theoretical yield of H2S (in moles) if 4.0 mol Al2S3 and 4.0 mol H2O are reacted according to the following balanced reaction. A possibly useful molar mass is Al2S3 = 150.17.I am having a little trouble with this one.nswers. Best Answer: You need 6 moles of H2O for every mole of Al2S3 but you have equal moles so the limiting factor with be the amount of H2O. From the equation 6 moles H2O gives 3 moles H2S So 4 moles H2O will give 2 moles H2S.
Multiply the atomic weight of each element by the number of atoms of the element in the molecule, and add these to calculate the compound molar mass. In the example, the molar mass of Na2SO4 is (23 x 2) + (32 x 1) + (16 x 4) = 142 grams per mole.Divide the known mass of the compound by its molar mass to calculate the number of moles. For example, suppose the mass of your sample of Na2SO4 is 20 g. The number of moles equals 20 grams /142 grams/mole = 0.141 moles.Multiply the number of moles by the Avogadro constant, 6.022 x 10^23, to calculate the number of molecules in your sample.In the example, the number of molecules of Na2SO4 is 0.141 x 6.022 x 10^23, or 8.491 x 10^22 molecules of Na2SO4.n the example, the molar mass of Na2SO4 is (23 x 2) + (32 x 1) + (16 x 4) = 142 grams per mole. Divide the known mass of the compound by its molar mass to calculate the number of moles. For example, suppose the mass of your sample of Na2SO4 is 20 g. The number of moles equals 20 grams /142 grams/mole = 0.141 moles.