Chemistry Answers

What will be the freezing point of an aqueous solution containing 80 g of NaCl? 

Show Its Given, Required, Equation, Solution, Answer

What type of intermolecular force will act in the following substance? Justify your answer. 

a. Sulfur Dioxide (SO₂) 

b. Nitrogen gas (N₂) 

c. Hydrogen fluoride 

The reaction of water with alkene to produce an alcohol is a/an ______ reaction.

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.

Briefly explain the physical and chemical methods of determining molecular weight/molar mass of high molecular compound with examples?

Write the word equation, skeletal and balanced equations of  Solid potassium chlorate when heated produces solid potassium chloride and oxygen gas.

What are the molar concentrations of the ions in 0.20 mol/L Al2(SO4)3?

How many kilograms of iron are present in 115 kg

kg of hematite?

In the following reaction, 5.96 g of Ammonia (NH₃) reacts completely with 180.00g Carbon dioxide (CO₂). Which is the limiting reagent?

Given: RMM of N=14; RMM of  H=1; RMM of C=12; RMM of O=16. 

                                       2 NH₃  + CO₂ → CN₂OH₄ + H₂O     

[L]

The pOH of a 0.0570 M solution of HCl is