How do you calculate average molecular weight?
To get the number average molecular weight you divide the total weight of the sample by the total number of the molecules.
How can we find the average molecular weight of air from the mole basis of its major ingredients?
Dry air is a mixture of gases where the average molecular weight (or molar mass) can be calculated by adding the weight of each component. The molecular weight (or molar mass) of a substance is the mass of one mole of the substance, and can be calculated by summarizing the molar masses of all the atoms in the molecule.
What is the average weight of air?
According to the International Standard Atmosphere (ISA) values—15° C at sea level—the density of dry air is at: In Metric units: 1.225 kg/m^3. In Imperial units: 0.0765 lb/ft^3.
What is number average molecular weight and weight average molecular weight?
October 4, 2018 Posted by Madhu. The key difference between number average and weight average molecular weight is that the number average molecular weight refers to the mole fraction of molecules in a polymer sample whereas the weight average molecular weight is the weight fraction of molecules in a polymer sample.
What is the molecular weight of air 29?
28.9647 g/mol
Oxygen has a molar mass of 15.9994 g/mol and nitrogen has a molar mass of 14.0067 g/mol. Since both of these elements are diatomic in air – O2 and N2, the molar mass of oxygen gas is 32 g/mol and the molar mass of nitrogen gas is 28 g/mol. The molar mass of dry air is 28.9647 g/mol.
What is the molecular formula for air?
There is no chemical formula for air as it is a mixture of many compounds. The major components would be Nitrogen (N2), Oxygen (O2), Carbon Dioxide (CO2), Water (H2O), and many others in minute amounts. Nitrogen makes up 78.1\% of air, while oxygen makes up 20.9\% of air.
How much does an air molecule weigh?
28.97 grams per mole
The molecular weight of dry air is 28.97 grams per mole.