no, but sometimes they are equal.
Added:
Molecular mass differs from more common measurements of the mass of chemicals, such as molar mass, by taking into account the isotopic composition of a molecule rather than the average isotopic distribution of many molecules.
As a result, molecular mass is a more precise number than molar mass.
However it is more accurate to use molar mass on bulk samples. This means that molar mass is appropriate most of the time except when dealing with single molecules.
By determining the molecular mass, then dividing the molecular mass by the formula mass of the empirical formula to determine by what integer the subscripts in the empirical formula must be multiplied to produce the molecular formula with the experimentally determined molecular mass.
The molecular mass is C2H7 you have 186.5 g of the substance, so calculate 2(12.01)+7(1.01)=31.09 so 186.5/31.09=6 so you can say C12H42 but when you divide 2 by 2 and 7 by 2 you obtain 1 and 3.5 because you have 3.5 you have to multiplied by 2 again, so you obtain the same formula as the empirical formula. It example is the same as water, which empirical formula es H2O as its molecular formula
Dicyclohexyl chemical formula is C12H22 and the molecular weight is 166,3031 (not 200).
To determine the molar mass without knowing the molecular formula, you can use techniques such as mass spectrometry, which measures the mass-to-charge ratio of ions, allowing you to infer the molar mass of the compound. Additionally, you can perform elemental analysis to assess the composition of the compound and then calculate the molar mass based on the known atomic masses of the elements present. These methods can provide an approximate molar mass even in the absence of the exact molecular formula.
C7h6o2
The molar mass of a compound is the same as its molecular weight, which is 58.44 g/mol.
Yes, molecular weight and molar mass are essentially the same concept in chemistry. They both refer to the mass of a molecule or compound, expressed in atomic mass units or grams per mole.
The atomic (molecular) weight of a substance is its molar mass.
The molar mass of NH2Cl is 51.5 g/mol, which means one mole of NH2Cl weighs 51.5 grams. The molecular formula of NH2Cl remains the same, NH2Cl, regardless of its molar mass.
molar mass of unknown/molar mass of empirial = # of empirical units in the molecular formula. Example: empirical formula is CH2O with a molar mass of 30. If the molar mass of the unknown is 180, then 180/30 = 6 and molecular formula will be C6H12O6
The empirical formula NH2Cl has a molar mass of 51.5 g/mol, so the molecular formula can be determined by finding the ratio of the molar mass of the molecular formula to the molar mass of the empirical formula. The molecular formula of the compound is therefore NH2Cl2.
I'm not exactly positive. But if you know the volume in grams and the mass (giving you density), then you should be able to figure out the molecular weight. The mass is the same as the molar mass, which I would assume is the same as the molecular weight, but I'm not positive.
c12h24
By determining the molecular mass, then dividing the molecular mass by the formula mass of the empirical formula to determine by what integer the subscripts in the empirical formula must be multiplied to produce the molecular formula with the experimentally determined molecular mass.
To find the molecular formula, you need the empirical formula and molar mass. If the molar mass is 160 plus 5 grams per mole, the molecular formula cannot be determined without additional information about the empirical formula's molar mass relationship.
The molecular mass is C2H7 you have 186.5 g of the substance, so calculate 2(12.01)+7(1.01)=31.09 so 186.5/31.09=6 so you can say C12H42 but when you divide 2 by 2 and 7 by 2 you obtain 1 and 3.5 because you have 3.5 you have to multiplied by 2 again, so you obtain the same formula as the empirical formula. It example is the same as water, which empirical formula es H2O as its molecular formula
Dicyclohexyl chemical formula is C12H22 and the molecular weight is 166,3031 (not 200).