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H2C2O4 + 2NaOH -> Na2C2O4 + 2H2O
if n(H2C2O4*2H2O) = 6.44*10-6, what is the amount of NaOH in moles?
1. (a) State Graham’s law of diffusion
(b) Arrange the following gases He,CH4,and N2 in order of increasing rates of diffusion, give reasons for your answers. [H = 1,He = 4,C = 12,N = 14]
2. 60cm3 of hydrogen diffused through a porous membrane in 10 minutes. The same volume of a
gas G diffuses through the same membrane in 37.4 minutes. Determine the relative molecular
mass of G. [H = 1]
(b) Arrange the following gases He,CH4,and N2 in order of increasing rates of diffusion, give reasons for your answers. [H = 1,He = 4,C = 12,N = 14]
2. 60cm3 of hydrogen diffused through a porous membrane in 10 minutes. The same volume of a
gas G diffuses through the same membrane in 37.4 minutes. Determine the relative molecular
mass of G. [H = 1]
THE HOTTEST AREA OF THE BUNSEN BURNER FLAME IS
The vapour pressure of a pure substance at a temparature is 40 bar. the actuel and ideal gas values of g/RT for tha saturated vapour at this temparature T and 40 bar are 5.0 and 5.8 respectevly. The figacity of the saturated liquid at these conditions is
What is the activation energy (in J ) of the reaction A B for which the rate constant is 13 sec -1 at 600K and 1.9 sec -1 at 300K
3g of Aluminium nitrate having molecular weight 212.996 g/mol was dissolved in water and total volume is 50g. If we take 3.5ml of that solution and dilute it up to 10ml while the density of new solution is 0.96g/cm3 what will be w/w and w/v of the new solution
Ammonium sulfate reacts with potassium hydroxide solution to produce ammonia gas, potassium sulfate, and water. Calculate the volume of ammonia gas, measured at 23oC and 64 kPa, that could be produced from 264.0 g of ammonium sulfate and 280.0 g of potassium hydroxide
Write names of compounds which cannot be classified as Arrhenius acid and base.
Element P reacts with element Q to form an ionic compound with formula P2Q3. If the electron configuration for Q is 2.8.6, what is the possible electron arrangement of P? *
A 2.8.2
B 2.8.3
C 2.8.5
D 2.8.6
A 2.8.2
B 2.8.3
C 2.8.5
D 2.8.6
Answer the following question by referring to the reaction stoichiometry given
C3H8 +5 O2 > 3 CO2 + 4 H2O
a) Calculate the mass of H2O is produced from the reaction of 6.3g of propane
b) Calculate how many molecules of H2O are produced when 2 moles of O2 are reacted with an excess of propane
c) Calculate how many atoms of hydrogen in water are produced when 2.4 moles of propane are reacted
d) Calculate how many molecules of CO2 are produced when 2.3 x10 6 atoms of O2 are reacted
e) CALCULATE THE MASS OF CO2 produced when 6.5 g of propane is reacted with 14.2 g of O2
C3H8 +5 O2 > 3 CO2 + 4 H2O
a) Calculate the mass of H2O is produced from the reaction of 6.3g of propane
b) Calculate how many molecules of H2O are produced when 2 moles of O2 are reacted with an excess of propane
c) Calculate how many atoms of hydrogen in water are produced when 2.4 moles of propane are reacted
d) Calculate how many molecules of CO2 are produced when 2.3 x10 6 atoms of O2 are reacted
e) CALCULATE THE MASS OF CO2 produced when 6.5 g of propane is reacted with 14.2 g of O2
