We know that: number of moles (n) = mass / molar mass
Now, from the general law of gases: PV = nRT where: P is the pressure = 500 torr = 0.65 atm V is the volume n is the number of moles R is the gas constant = 0.082 T is the temperature = 300 k We will just rearrange this equation as follows: P = nRT / V Then we will substitute n with its equivalent equation mentioned at the beginning: P = (mass x R x T) / (volume x molar mass) ......> equation I Now, we know that: density = mass / volume We will substitute (mass/volume) in equation I with density as follows: P = (density x R x T) / molar mass Rearrange this equation to get the mass as follows: molar mass = <span>dRT/P = (0.216 x 0.082 x 300) / 0.65 = 8.4738 grams </span> From the periodic table: molecular mass of hydrogen = 1 grams molecular mass of nitrogen = 14 grams Therefore: molar mass of hydrogen = 2 x 1 = 2 grams molar mass of nitrogen = 2 x 14 = 28 grams
We can assume that the number of moles of of each element is y. We can thus build up the following equation: 2y + 28y = 8.4738 30y = 8.4738 y = 0.28246
Therefore: mole fraction of hydrogen = 2 x 0.28246 = 0.56492 mole fraction of nitrogen = 28 x 0.28246 = 7.90888
The standard formation reaction is the synthesis of 1 mole of a substance from its elements in their most stables forms under standard conditions. The balanced chemical equation is:
Aluminum nitrate is a salt composed of aluminum and nitric acid, belonging to a group of reactive chemicals - organic nitrate and nitrite compounds. The nitrate ion is polyatomic, meaning it is composed of two or more ions that are covalently bonded. This ion makes up the conjugate base of nitric acid.
