General Chemistry Answers

The Lewis structures are incorrect. Explain what is wrong with each one and give a correct Lewis structure for the molecule.

•• ••

H—C=N

••

Colligative properties are highly dependent on the chemical composition of the solute in a solution. true or false

Consider this reaction: 2NOCI(g)⇌NO2(G)+CI2(g) ∆ H=77.16 KJ/mol

Predict the direction of shifting (to the left/right) if the following stresses are applied

1) [NOCI] is increased

2) Temperature is decreased

3)pressure is increased

4) [CI2] is increased

calculate the percent yield of this reaction if 623g of ammonia produces 2341g of ammonium bromide

consider this reaction: CI2(g)+F2(g)⇌2CIF(g) K=19.9

1) give its Q expression

2) Solve for Q if the initial concentrations are [CI2]= 0.5M, [F2]= 0.2M, and [CIF]= 7.3M

3) Predict the direction of the reaction given the initial concentration of the substances in the reaction mixture

What is the osmotic pressure in atm of a 0.002m sucrose (C12H22011) solution at 20-degree celsius? use gas constant R=0.08210 L x atm/mol x k

Cal. PH and POH for each of the following solutions at 25°c.

i) 1.0×10^-3 OH-

I) 1.0m H+

Draw a Hess cycle to calculate enthalpy of formation of ClO₂ given:

∆H^ѳ_f (AgClO₃) = -25kJ/mol

When taking the average titre value,the reading values must be what numbers

how many moles of nitrogen are found in 8 x 10^24 molecules of nitrogen gas?