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A 1.345-g sample of a compound of oxygen and barium was dissolved in the hydrochloric acid to give a solution of barium ion, which was then precipitated with an excess of potassium chromate to give
Determine the concentration of the Na2S2O3 solution if the 36.30 mL of a0.1100 M I2 solution react exactly with a 100.0 mL sample of the Na2S2O3 solution.
A sample of iron ore which is having 3.33-g, transformed to a solution of iron(II) sulfate, FeSO4, and this solution is titrated with the 0.150 M K2Cr2O7 (potassium dichromate).
Determine the value of k for this reaction if the half-life for this reaction is 2.00 s when [NOBr]0= 0.900 M. Explain how much time is needed for the concentration of NOBr to decrease to 0.113
You dissolve the tablet in hydrochloric acid and filter off insoluble material. An antacid tablet has calcium carbonate as the active ingredient; other ingredients include a starch binder.
Under the same conditions, the rate of effusion of Pure Methane (CH4) gas is 47.8 mL/min. What is the molar mass of unknown gas if the rate of effusion of a particular gas was calculated and found
A 10.00-gram sample of this mixture is dissolved in the acid, and reacted with excess sodium oxalate to produce a precipitate which is a mixture of the thorium oxalate, Th(C2O4)2 and the calcium oxa
How can calculate the purpose of using the brine in the experiment, in a lab we completed a reaction, and then washed the ether layer with brine.
Discuss what mass of AlBr3 will be formed if 1.00 gram of Al totally reacts with the excess Br2? Aluminum will react with the bromine (Br2) to produce AlBr3.
When 1.00 gram of Compound D is totally combusted, 0.735 g H2O and 0.900g CO2 are collected. Calculate the complete empirical formula of compound D.
The protein has a MW of 35,000. One is interested in determining the affinity of P for leonine. An amino acid binding protein (P) is released from E. coli by the osmotic shock, and purified to homog
Determine the numbers of times can you divide evenly a piece of 10 cm copper wire until it is reduces to two separate copper atoms if the diameter of a copper (Cu) atom is roughly 1,3*10-10m.
Determine the numbers of moles of H2SO4 are required to make the 855 grams of K2SO4 by using the equation
A sample is composed of a mixture of CuSO4 and CaCO3· 5H2O. A chemist decided to calculate the mixture by dehydrating it by heating it to 120° for12 hours. If a 5.327 g sample weighed 4.2
When solid sodium hydrogen sulfite, NaHSO3, is heated, sulfur dioxide gas, SO2; solid sodium sulfite, Na2SO3; and the water vapor are produced.
Zinc added to 50ml of a .100 M AgNO3, constant pressure calorimeter. Temperature rises from 19.25 C to 22.17C, the Heat capacity of calorimeter = 98.6 J/C. Determine the enthalpy change (delta H) fo
Write down a reaction to account for what is happening.Discuss is the bisulfate ion acting as an oxidizing or redacting agent?
Determine the numbers of spectator ions are present in the metathesis reaction in which the silver (I) acetate reacts with nitric acid to produce the silver(I) nitrate and the acetic acid?
At a point downstream, the air flows through a 5.00cm ID pipe at 60 degrees Celsius and 1.53 bars (gauge). A stream of air enters a 7.50-cm ID pipe at a velocity of 60 m/s at 27 degrees Cel
An aliquot of a nitric acid solution which is having 25.0 mL of unknown concentration is pipette into a 125 mL flask, and 2 drops of phenolphthalein are added.
Write down a thermodynamic equilibrium constant expression to represent the reaction of solid lead (II) sulfide with aqueous nitric acid to form the solid sulfur, a solution of nitrogen monoxide and
Discuss how much heat would be needed to change the temperature of 150g water from the 25C to 75C? Explain what volume of mercury which is having the density 13.6g/cm3 will have 0.0375kg? (go to 2 dec
Explain what state of a) benzene and b) naphthalene may be reached by the electric dipole transitions from their (totally symmetrical) ground state?
Determine the average mass percent of oxygen in potassium chlorate using your two experimental values. Is it lower than either of your individual experiments How well do your experimental results ma
Determine the numbers of mL of 1M CuSO4 is required for 1g Zn to completely react based on the equation : Zn(s) +CuSO4(aq) --> Cu(s) +ZnSO4(aq)