what are the molecular weights for urea, ethylene glycol, glycerol, and glucose?
814337
This will help you out! \n\nhttp://www.webqc.org/mmcalc.php
856873
The balanced chemical equation and the molecular weights of the reactants and products.\n\nIn simplest form, assume\n\nXY + AB = XB + AY.\n\nAssume the molecular weight of XY is 50, and of XB 35.\n\nFor every 50 grams (or pounds, tons, or any other measure of mass) of XY you use, you will get 35 grams (or whatever) of XB.\n\nEDIT:\n\nOK. Atomic weights are H=1, S=32, Cl=35.5, Fe=56. Molecular weights are FeS=88, HCl=36.5, H2S=34, FeCl2=127.One gram molecular weight of each is its molecular weight in grams. So if you react 88 grams of FeS with 36.5 x 2 grams of HCl (the balanced equation tells you that you need 2 moles of HCl, so you multiply by 2), you will get 34 grams of H2S and 127 grams of FeCl2. \n\nNotice that the weights balance. You put in 88 + (36.5 X 2) grams, or 161 grams. You got out 127 + 34, or 161 grams.\n\nYou need the mass of any one of those compounds - either reactant or product - to determine all the others. Calculate the moles of the one for which you have the mass, determine the ratio of the moles of that one to the others, multiply by that ratio and then multiply result by molecular weight.
961444
We will need to find if there is a limiting material.\n\nCO + 2H2 ------> CH3OH\n\n(1.61 g H2)*(1 mole H2/2.016 g) = 0.7986 mole H2\n\n(0.7986 mole H2)*(0.5 mole CH3OH/mole H2) = 0.3993 mole CH3OH at most\n\n(15.95 g CO)*(1 mole CO/28g) = 0.5696 mole CO\n\n(0.5696 mole CO)*(1 mole CH3OH/1mole CO) = 0.5696 mole CH3OH at most\n\nH2 is the limiting reagent, therefore:\n0.3993 mole CH3OH * (32.032 g/mole CH3OH) = 12.79 g\n\nPlease check for errors, I went by memory on what the atomic and molecular weights were, you may want to check this.
814025
Water H2O    sugar   C6H12O6     salt NaCl    \nbaking soda NaHCO3
957979
64 g \nOxygen is diatomic. So molecular weight = 16*2 =32.\nTherefore mass of 2 moles = 64g.
715558
OK, but you need to look up atomic weights or calculate molar mass.\n\n   Grams = Moles x molar mass  OR  moles x atomic mass\n\n    Moles = Grams/(molar mass) OR Grams/(atomic mass)
449290
Allyl propionate has a molecular weight of 114.1438 amu.  A good site to go on for this sort of information is www.chemfinder.com, I use it frequently.
977990
IF it is of a disaccharide, both being 6 carbon sugars, such as in the case of sucrose (i thinking glucose and mannose? or gluc and fruc?) and their are 12 Carbons, than essentially 12 CO2 molecules, thus D would be the answer.
601898
sugars consist of carbon, hydrogen and oxygen (glucose is C6O6H12) and hydrocarbons consist of carbon and hydrogen only. (methane is CH4)
386162
Calcium phosphate is Ca3(PO4)2.  Phosphorus trichloride is PCl3.  Determine the molecular weight of each and then figure out how much of that weight comes from phosphorus.\n\nUsing approximate atomic masses,\n\nCa3(PO4)2 = 3*40 + 2*31 + 8*16 = 310; %P = 62/310 = 20%\n\nPCl3 = 31 + 3*35.5 = 137.5; %P = 31/137.5 = 22.5%
593836
Molecular mass ~160kDa; two light chains: 23-25 kDa each; two heavy chains:~53 kDa each \nIsoelectric point 6.1-8.5 (7.3 +/-1.2)
984048
http://en.wikipedia.org/wiki/Urea
187568
You can come up with a molecular weight of air - use the percentages of the different molecules comprising air and the molecular weight of the components.  The answer is around 29 g/mol (I think).
308860
The molecular weight of acetaldehyde is 44.053 amu.  A good site to go to for questions about simple organic molecules is http://www.chemfinder.com.\n\nThe person below me used only whole numbers for the masses of the atoms.  Carbon doesn't weight 12 amu, it weighs 12.011 amu and Hydrogen weighs 1.008 amu.
86157
"water has the molecular formula H2O, indicating that there are two atoms of hydrogen and one atom of oxygen in a molecule of water. Rounded to three decimal places, the atomic weight of hydrogen is 1.008 amu and that of oxygen is 15.999 amu. The molecular weight of water is thus (2×1.008)+(1×15.999)=2.016+15.999=18.015 amu. Since atomic weights are average values, molecular weights are also average values. On the average, a molecule of ordinary water weighs 18.015 amu."
52163
glycogen, a polymer of glucose.
157082
Specifically: water, pyridine, squalene, urea, acetic acid, lactic acid, complex alcohols and glycols, ketones, and aldehydes.