Organic Chemistry Answers

How many grams of Iron are produced when 25.0g Fe2O3 reacts with Aluminum? Show your complete solution including the balanced chemical equation.

The following industrial processes produce ethanol.

Hydration of ethene: C2H4(g) + H2O(g) =C2H5OH(l)

Fermentation of glucose: C6H12O6(aq) = 2C2H5OH(aq) + 2CO2(g)

(a) What is the atom economy by mass of the fermentation process?

A) 25.6%

B) 46.0%

C) 51.1%

D) 92.0%

Write the MBE, PBE and CBE for the following:

a. 0.15M H₂CrO₄

b. 0.35M KClO₄

c. 0.50M NaHSO₄

Draw and name the product of reduction from 2-ethyl-3,4-dimethyloctanal + H

Draw all possible conformations of 1,2-dimethylcyclohexane and compare their stabilities,

Explain "Tertiary alkyl halides are more reactive than primary and secondary alkyl halides in SN1 and less reactive in SN2 reactions" with the help of suitable examples.

changing the position of the OH Functional group changes the enthalpy of combustion. so primary secondary and tertiary have different enthalpies of combustion. However, I don't understand why!

primary alcohols have a higher enthalpy of combustion, then secondary then tertiary.

for example

(butan-1-ol): -2670 kj/mol

(butan-2-ol): -2660.6

(2-methylpropan-2-ol): -2644.0

I know that: primary alcohols only have 1 alkyl group secondary has 2, tertiary 3. the alkyl groups provide stability due to I effect. Also tertiary is protected from oxidization as its carbon has no hydrogen to donate. Also, less branching means molecules can pack closer together and experience stronger hydrogen bonds.

However, the enthalpy of combustion is unaffected by intermolecular forces, right? it has to do with intramolecular forces within the molecule.

Is it to do with the branching? do intermolecular forces actually affect the enthalpy of combustion? surely not when combusted as a gas like in a combustion chamber.

the following name are never used in the iupac system .1,3 dimethylpropane

0.20 g of x an vaporisation gave 400cm cubed of vapour measured at 100 celsius and a pressure of 100kpa. the relative molecular mass is.............

0.20 g of x an vaporisation gave 400cm cubed of vapour measured at 100 celsius and a pressure of 100kpa. the relative molecular mass is.............