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Chemistry
what type of analysis (quantitative, qualitative, fundamental, characterization or combination) is required to solve following problems and why?
a) Export Fishes are believed to be contaminated with mercury
b) A newly discovered fresh water reservoir is believed to have arsenic levels greater than WHO recommended safe values.
c) A new indicator is required for complexometric titration
d) The structure of a newly discovered virus needs to be determined.
e) The structure of a newly synthesized drug needs to be determined
a) Export Fishes are believed to be contaminated with mercury
b) A newly discovered fresh water reservoir is believed to have arsenic levels greater than WHO recommended safe values.
c) A new indicator is required for complexometric titration
d) The structure of a newly discovered virus needs to be determined.
e) The structure of a newly synthesized drug needs to be determined
Chemistry
- When a current of 0.82A was passed for 5 hours through an aqueous solution of metal “Z” 2.65g of metal were deposited Determine the change on the ions of metal (A faraday = 96,500 coulomb) relativeatomic mass of Z = 52 ( 2 mks)
Chemistry
what type of analysis (quantitative, qualitative, fundamental, characterization or combination) is required to solve following problems and why?
a) Export Fishes are believed to be contaminated with mercury
b) A newly discovered fresh water reservoir is believed to have arsenic levels greater than WHO recommended safe values.
c) A new indicator is required for complexometric titration
d) The structure of a newly discovered virus needs to be determined.
e) The structure of a newly synthesized drug needs to be determined.
a) Export Fishes are believed to be contaminated with mercury
b) A newly discovered fresh water reservoir is believed to have arsenic levels greater than WHO recommended safe values.
c) A new indicator is required for complexometric titration
d) The structure of a newly discovered virus needs to be determined.
e) The structure of a newly synthesized drug needs to be determined.
Chemistry
H2C2O4 + 2NaOH -> Na2C2O4 + 2H2O
if n(H2C2O4*2H2O) = 6.44*10-6, what is the amount of NaOH in moles?
Chemistry
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]
Chemistry
THE HOTTEST AREA OF THE BUNSEN BURNER FLAME IS
Chemistry
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
Chemistry
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
Chemistry
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
Chemistry
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
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#339914 on Dec 2023
#339914 on Dec 2023