1. You want to make 100 g of an aromatic polyester with a molar mass of approximately 5000.
a) What extent of reaction is required to get a number average degree of polymerisation that will give a molar mass of 5000?
1. You want to make 100 g of an aromatic polyester with a molar mass of...
It is desired to prepare polyester with the number average molecular weight, Mn 5000 g/mol by reacting of 1 mol butane-1,4 diol (HO-CH-CH2-CH2-CH2-OH) with 1 mol of adipic acid (HOOC-CH2-CH2-CH2-CH2-COOH) (a) Write chemical equation illustrating synthesis of the polyester. (b) Calculate the value of the monomer conversion at which the reaction should be stopped to obtain this polymer, assuming perfect stoichiometric balance. What would be polydispersity index for the polymer obtained? (c) Assuming that 0.5 mol % of the diol...
4 points Suppose you want to make a 0.6 M FeCl3 (molar mass = 162.2 g/mol) solution. If you have 1.01 grams of iron (III) chloride, what volume (in mL) of water will you need to make the 0.6 M solution? * Your answer
What mass of a compound with a molar mass of 236.6 g/mol is required to make 96.1 mL of a solution of 1.8M?
Q) How many grams of sucrose C12H22O11 (molar mass =342.29 g/mol) must be added to 100. g of water at 100 degree C to change the vapor pressure to 752 mm Hg ? answer 20.2 g Please explain thank you
Assume you need to make a new linear, high molecular weight, polyamide or polyester Q. 1 (a) Give the structures of the polymers that could be formed from the following monomers and in each case identify the repeating unit -NH2 H2N- OH -ОН но. Но 2 NH2 CI H2N 3. НО. ОН Но ОН 4. OH но 5. Describe the issues you must be aware of in order to consistently achieve high (b) molecular weight polyamide or polyester? Assume you...
you dissolve 0.125 g of this sultry aromatic compound in 25.0 g of chloroform, you discover that the solution boils at 61.82oC. What is the molar mass of this quixotic compound? (FYI: chloroform’s normal BP is 61.70oC; kb = 3.63oC/m)
How many grams of NaCl (1 molar mass = 58.44 g/mol) are required to make 350 mL of a 1.25 M NaCl solution
Exact mass of sodium bicarbonate: 2.110g Molar mass of sodium bicarbonate: 84.007 g/mol Molar mass of sodium acetate: 82.034 g/mol After you have recorded and any other glassware you have used. All waste can go down the sink. the mass of the beaker after the reaction, you may rinse out the beaker 10. CALCULATIONS: a) Rewrite the balanced chemical equation here Calculate the theoretical amount of sodium acetate that should be formed in the reaction (follow steps 1-3 below). b)...
You mixed 5.25 g of methanol and a carboxylic acid whose molar mass is 138.12 g/mol and heated to obtain an ester. What is the molar mass (in g/mol) of the ester produced? Give a numerical answer to the nearest 0.01.
1- What mass (in g) of AgNO3 is required to make 100.0 mL of a 0.100 M solution? 2. You are preparing 2.00 L of a 1.00 M solution of hydrochloric acid. You have a stock bottle of concentrated acid (12 M). How much 12 M acid do you need to make your dilution in mL? 3-What volume (in mL) of 0.125 M AgNO3 is required to react completely with 35.31 mL of 0.225 M Na3 PO4? The balanced reaction...