Answer:88.8%
Explanation:
%yield= actual yield/theoretical yield * 100/1
41.9/47.2*100/1= 88.8%
The dense aerosol cloud created caused decreases in the amount of solar radiation that reached the Earths surface.
Part I4Fe + 3O2 -> 2Fe2O3. This is redox reaction and the reaction is also called rusting. The reaction can be classified as a combination reaction.
Part II2H2O2 -> 2H2O + O2. The evolution of bubbles was the indication that a chemical reaction was taking place.
Part III.2Zn + 2HCl -> H2 + ZnCl2. A displacement reaction occurs in the reaction. A metal and a acid are common reactants in this reaction.
Part IV.NaHCO3 + CH3COOH -> CH3COONa + H2CO3
The second reaction isH2CO3 -> CO2 + H2O
which is decomposition reaction.
The formula for boiling point elevation is:
deltaT = (Kb)(m), where m is molality of moles solute per kilogram solvent
1.305 = 3.630m
m = 0.3595 = moles/kg solvent
Since we have 1 g of chloroform solvent, this is equivalent to 0.001 kg.
The number of moles is 103 mg or 0.103 g, divided by the molar mass (MM).
0.3595 = (0.103/MM) / 0.001
0.0003595 = 0.103/MM
MM = 286.51 g/mol
Therefore, the molar mass of retinol is 286.51 g/mol
