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How is molecular weight related to intermolecular forces? Chemistry Matter Atomic Mass. 1 Answer anor277 ...
The glass transition temperature T_g increases with molecular weight and asymptotically approaches a maximum value. > The glass transition temperature is the temperature range in which a polymer changes from a rigid “glassy” state to a more pliable “rubbery” state. In polymer chemistry, the Flory–Fox equation relates the number-average molecular mass M_n of a polymer to its glass ...
The atomic / molecular weights are: Nitrogen: 14.0067 x 2 = 28.0134 g/mol (remember it is N 2) Oxygen: 15.9994 x 2 = 31.9988 g/mol (remember it is 02) Argon: 39.948 g/mol. Carbon dioxide: 44.01 g /mol. We know the percentage composition so we can use that to work out the weight of each component:
In the ABSENCE of other intermolecular force, the higher the molecular mass the greater the boiling point. Look at the alkane series: methane, ethane, propane, butane, etc. The longer the alkyl chain, the greater the degree of dispersion force between molecules, and thus the greater the boiling point. Of course, as a chemist, as a physical ...
Calculate the molar mass of the fragment. The average mass of a base pair is 650 u. Hence, the mass of the fragment is. 3176bp × 650 u 1bp = 2.06× 106lu. and the molar mass is 2.06 ×106lg/mol. Here are the steps you might follow. Step 1. DNA restriction If you have a large DNA molecule, you will probably cut it into smaller fragments using a ...
O = 16.00. To find molecular weight: H = 1.01 x 2 = 2.02 (have to multiply by two since water has two hydrogen atoms) O = 16.00 x 1 = 16.00. The total molecular weight is 18.02 - this was found by adding the total mass from H with the total mass from O. This will also be the molar mass of water.
P V = m M M RT. therefore, the molecular mass expression can be written as: M M = mRT P V. Thus, to find the molecular mass of a gas, we can measure its pressure, volume, mass and temperature. MM= (mRT)/ (PV) To find the molecular mass of a gas, we can assume it behaves ideally and use the ideal gas law: PV=nRT We can modify this law in terms ...
Apr 12, 2018. 18.01528 u. Explanation: H 2O is water. It consists of two hydrogen atoms and one oxygen atom. So, the molecular mass of H 2O would be the total mass of the two hydrogen atoms and one oxygen atom. Looking at the periodic table, each hydrogen atom has a mass of 1.00794 u, while each oxygen atom has a mass of 16 u.
To determine a compound's molecular weight, you simply have to add all the atomic weights of the elements involved. For SO4, M W SO4 = (32.066 g mol) + (15.9994 g mol)(4) M W O4 = 96.064 g mol. Answer link. iOS.
It is imperfect to define molecular weight for the substance having no molecular entity as in the case of purely ionic compound like NaCl. So Formula weight is more perfect for it. Some compounds do not exist as individual molecules. For example, there is no such thing as a molecule of sodium chloride. That's why it is appropriate to use the term formula weight for this type of compound ...