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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.
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 ...
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 ...
You start by determining the empirical formula for the compound. Determine the mass in grams of each element in the sample. If you are given percent composition, you can directly convert the percentage of each element to grams. For example, a molecule has a molecular weight of 180.18 g/mol. It is found to contain 40.00% carbon, 6.72% hydrogen and 53.28% oxygen. Convert the percentages to grams ...
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:
To find the molecular weight of the empirical formula you add up the atomic masses of each element from the periodic table. Let's say the empirical formula is C2H 3. To find the carbon you multiply 12.01 x 2 and add it to the mass of the hydrogen, 1.01 x3. The total molecular weight is 27.05 amu. Often this is called the empirical mass.
1 Answer. The density D is calculated by: D = m V. The relationship between the mass m and the molecular weight M M is the following: n = m M M ⇒ m = n ×M M, where, n is the number of mole of the substance in question. Therefore, D = n ×M M V. D= (nxxMM)/V The density D is calculated by: D=m/V. The relationship between the mass m and the ...
The molecular mass of sulfur is 256 u. As you might have guessed, this is a boiling point elevation problem. The formula for boiling point elevation is ΔT_"b" = K_"b"m We need to look up the values of T_"b"^"o" and K_"b" for CSâ‚‚. They are T_"b"^"o" = 46.2 °C and K_"b" = 2.37 °C·kg/mol ΔT_"b" = T_"b"^"o" – T_"b" = (49.48 – 46.2) °C = 3.28 °C We can use this information to calculate ...
I would determine the mass of a fixed volume of the gas at a known temperature and pressure and then use the Ideal Gas Law to calculate the molar mass. > EXAMPLE The mass of an evacuated 255 mL flask is 143.187 g. The mass of the flask filled with an unknown gas at 25.0 °C and 265 Torr is 143.289 g.
A naturally occurring sample of chlorine is 75.78% chlorine-35 and 24.22% chlorine-37, so, to calculate the average mass, we need to do the sum. 35 ×0.7578 +37 ×0.2422 = 35.5. which gives us the mass shown on the periodic table, 35.5 u. Here is a video which summarizes how to calculate average atomic mass. video from: Noel Pauller.