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Q1. What is valency of an element?
Q2. What is the valency of Cl in HCl?
Q3. What is the valency of nitrate radical in Nitric acid and sulphate radical ion in sulphuric acid?
Q4. What is the valency of elements which do not combine with hydrogen?
Q5. Explain the valency of an element in electronic state.
Q6. What are univalent or monovalent ions?
Q7. What are cations?
Q8. Give examples of univalent,divalent and polyvalent cation
Q9. Explain the law of constant composition
Q10. What is the law of conservation of mass?
an ingot of aluminum metal with a mass of 87.50 g is to be hammered into a thin sheet to be used as aluminum foil. if
Use the Henderson Hasselbalch Equation to calculate the pH after the addition of 0.10 M NaOH to this solution, assuming no change in volume?
What is the percent purity of the calcium hydroxide if the titration requires 13.88 mL of the acid to reach the endpoint
Question- Consider 0.10 M solutions of the following substances. Rank the solutions in order of increasing pH where 1 is the solution with the lowest pH and 7 is the solution with the highest pH.
Calculate the pH of a buffer solution made by mixing 49 ml of a 0.07 M ammonia solution with 52 ml of a 0.10 M ammonium nitrate solution. Give the pH to two decimal places.
Calculate the molarity of a solution of glycerol made by dissolving 53.000 mL glycerol at 15 'C in enough water to make 270.00 mL of solution.
Explain a steam turbine in a small electric power plant is designed to accept 4500 kg/h of steam at 60 bar and 500oC as well as exhaust the steam at 10 bar. Presuming that the turbine is adiabatic and has been well designed so that 0=gen)
In a .050 M HCl solution an indicator is not all in acid form. For methyl orange, what percentage of the indicator is in each form
A colored compound or complex ion provides a preliminary indication of the presence of which of the aluminum Group ions? Give the chemical formula
Antimony has two naturally occurring isotopes, Sb-121 (mass = 120.9038 amu) and Sb-123 (mass = 122.9042 amu). Calculate the percent abundances of these isotopes of antimony
In the process of producing sparkling wine from grape juice, the sugar glucose is decomposed to form ethanol and carbon dioxide. If 23 g of C6H12O6 is fermented, what volume of gaseous CO2 will be produced at a temperature of 29°C and a pressure o..
What is the half-life of a compound if 60. percent of a given sample of the compound decomposes in 54 min
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