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Q1. How the groups are numbered in modern periodic table?
Q2. How the groups were numbered in periodic table of American system of naming?
Q3. How the groups were numbered in periodic table of European system of naming?
Q4. Do the groups from 3-10 have any trivial names?
Q5. Which properties show pattern in periodic table?
Q6. How the atomic radii show variation from top to bottom?
Q7. How the ionization energy varies in moving down the group from top to bottom?
Q8. How the electronegativity varies in moving down the group from top to bottom?
Q9. What was the position of noble gases in original form of Mendeleev's periodic table?
Q10. What is the position of hydrogen element in the modern periodic table?
A wastewater treatment plant discharges treated sewage into a river, the effluent contains a daily average of 15mg/L of NH4+. The rate constant of NH4+ bio-consumption is 0.03 1/d
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Assume that the initial purple solution is 16.05mg/L in sodium salicylate, 0.15M in HCl and 0.065 M in iron(III) ions. What are the concentrations of these three once you diluted the 10.00 mL to a final volume of 50.00 mL in the volumetric flask
how many grams of Na2CO3 (FM 105.99) should be mixed with 5.00 g of NaHCO3 (FM 84.01) to produce 100ml of buffer with pH 10.00.
the assignments contain questions that should be addressedwithin the body of a short paper.do not turn in short answers
Choose the more metallic element from each of the following pairs: Sr or Sb, Zn or Hg, As or S.
If 30.0 grams of sulfuric acide react with 25.0 g of aluminum hydroxide, identify the limiting reactant.
Acylation of n-propylbenzene gives an unexpected side product. Explain this occurance and give a mechanism.
The piece of iron with a mass 102.9g was submerged in a graduated cylinder filled with water. The initial level of water was 20.0 ml. The density of iron is 7.86 g/ml.
A standard solution of 0.243 M NaOH was used to determine the concentration of a hydrochloric acid solution. If 46.33 mL of NaOH is needed to neutralize 10.00 mL of the acid, what is the molar concentration of the acid
A rigid Vessel containint initially 100kg of water is going to be heated from 25 degree C to 80 degree C using steam as a medium. the steam will be added slowly such that all the steam condenses.
Find the pH of the equivalence point and the volume (mL) of 0.0740 M KOH needed to reach the equivalence point in the titration
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