62.72
gram molecular weight of C6H8O7=(atomic weigth of carbon X 6)+(atomic weigth of hydrogen X 8+(atomic weigth of oxygen X 7) grams
gram molecular weight = weight of one mole of the substance in grams for example 1 mole of water weighs 1 + 1 + 16 = 18 grams so gram molecularweight of water is 18g
Start with the molecular weight of oxygen, twice the atomic weight because it's O2. So the molecular weight is 32. Now at school you learn that a gram-mole of any gas occupies 22.4 litres. A gram-mole of oxygen weighs 32 grams (1 gram times the molecular weight). Therefore 32 grams of oxygen occupies 22.4 litres (at normal temperature and pressure). 22.4 litres of water (specific gravity = 1) weighs 22400 grams. Therefore the specific gravity is 32/22400 = 0.00142857 . . That's it!
The only difference is the name of the unit; the numerical values are the same. However, the value in amu is the mass of a single molecule, while the molecular weight in grams is the mass of Avogadro's number of molecules. The mass of Avogadro's number of molecules is called a Gram-mole. The molecular weight of , say, Hydrogen H2 is 2 amu. A gram mole of this would be 2 grams. The molecular weight in grams is the weight of this molecule in real grams and is an extremely small value.
The number of grams in a millimole depends on the molecular weight of the substance being measured. To calculate it, you need to know the specific molecular weight of the substance.
See the Related Questions to the left of this answer:"How do you convert from grams to moles and also from moles to grams?"
To find the gram molecular mass of the compound, you can use the formula: mass = moles × gram molecular mass. Given that 5 moles of the compound have a mass of 100 grams, you can rearrange the formula to find the gram molecular mass: gram molecular mass = mass / moles. Thus, gram molecular mass = 100 grams / 5 moles = 20 grams per mole.
Not sure what you mean by "numerical portion," since the gram-atomic weight is a number. Basically, gram-atomic weight (or gram-molecular weight when molecules, like CO2 or H20, are involved) is the amount of a substance in grams equal to its atomic weight. The atomic weight of an element is equal to the sum of its protons and neutrons in its nucleus. The number is often expressed as an integer: 16 for Oxygen, for example. More precisely, it is 15.9994, because of the existence of isotopes of Oxygen that have fewer neutrons in their nuclei than the most common isotope. The 15.9994 value represents the weighted average of all the atomic weights of all isotopes of Oxygen.
The a.m.u. is defined as the fraction of 1/12 of an atom of the carbon-12 isotope. The value is pretty nearer to the mass of a hydrogen atom. Therefore, in every compound, the gram molecular weight is numerically equal to the molecular mass in atomic mass units. Therefore the gram molecular weight of NaOH is 40 g/mol.
I will assume the ether behaves as an ideal gas. In that case, a mole (gram molecular weight) of the gas occupies 22.4 liters at STP. If 3.96 liters weigh 8.12 grams, then 22.4 liters weighs x where: 8.12/3.96 = x/22.4 Turn the crank, and 22.4 liters of ether weigh 45.9 grams, the gram molecular weight of ether.
You first divide the amount of molecules by avagadros number (6.022x10^23) to find out how many moles you have. Then you find out the molecular weight of the compound. You multiply the number of moles by the molecular weight to give you your weight in grams.
To calculate the gram molecular weight of an unknown liquid, you need to determine the molecular formula of the liquid and then add up the atomic weights of all the atoms in the formula. This will give you the gram molecular weight of the unknown liquid.