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Q. 1: Water contains following impurities in ppm: Ca(HCO3)2 = 75 ppm, Mg(HCO3)2 = 73ppm, CaCl2 = 95 ppm, MgSO4 = 30 ppm, CO2 = 20. Calculate the amount of lime (85%pure) and Soda (95% pure) require for softening of 2,50,000 litres of water using sodiumaluminate as a coagulant at the rate of 16.4 ppm.
2.20 grams of chromium reacts with excess oxygen to give 3.22 grams of a chromium oxide. What is the name and formula of the chromium oxide. Write a balanced equation for the reaction
cheap ethanol c2h5oh manufactured from crude oil can be used in fake wine instead of of ethanol derived from
Electron Donor and Receptor in Metal Complexes, In the first step of the catalytic cycle, the alkene bonds to palladium to make a new metal complex The alkene is now a ligand because the pi-bond of the alkene is donating some of its electrons to p..
You titrated 1.740g of a solid unknown acid that wasdissolved in 100.0 mL of distilled water; the initial pH value was 2.5. You found that pH= pKa =4.2 when 12.50 mL of NaOH had been added. The concentration of the sodium hydroxide was 0.500M. Cal..
A 25.5 mL aliquot of HCl (aq) of unknown concentration was titrated with 0.113 M NaOH (aq). It took 51.2 mL of the base to reach the endpoint of the titration. The concentration (M) of the acid was
Calculate the energy of a photon emitted when an electron in a hydrogen atom undergoes a transition from n = 6 to n = 1.
List the similarities and differences between the classical - and - quantum-mechanical equations of motion. How does the latter account for the quantization of energy and wave-particle duality
A solution is 0.0100 M in Pb2+ ions. If 0.103 mol of solid Na2SO4 is added to 1.00L of this solution (with negligible volume change), what percent of the Pb2+ ions remain in solution.
The following density measurements were made on a bar of iron: 7.58 g/mL, 8.02 g/mL, 7.83 g/mL, 7.80 g/mL, and 7.66 g/mL. The accepted value for iron's density is 7.85 g/ML. Find:
The decomposition of KClO3 proceeds spontaneously when it is heated. Do you think that the reverse reaction, the formation of KClO3 from KCl and O3 is likely to be feasible under ordinary conditions
By substituting two hydrogen atoms on the benzene ring with methyl groups, write line-angle formulas of all constitutional isomers. Name each isomer.
How is the ideal gas law modified to account for the finite volume of molecules? The temperature of the sea bed 60 m below the surface and at the surface are both 20C. A rubber balloon is inflated at the sea bed with 2.0 mole gas neglecting the wo..
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