Chemistry Answers

An electrochemical cell consists of iron electrode dipped in 0. 1M FeSO4 and silver electrode

dipped in 0.05M AgNO3. Write the cell representation, cell reactions and calculate emf of the cell

at 298K.Given that the standard reduction potentials of iron and silver electrodes are – 0.44V

and + 0.80 V respectively.

Explain the meta directing nature of NO2 group?

(ii) A metal M forms two chlorides P and Q. On analysis, 2.00g of P was found to contain 0.69 g of M and 10.00 g of Q was found to contain 4.41 g of M.

Calculate the time for which a current of 0.65A be passed through molten magnesium chloride to get 5g of magnesium (given :Mm(Mg)=24.25gmol-^1

The specific conductance of acidic acid is 1.63 and molar conductance at inginite is 390.7 .calculate the degree of dissociation

Find the mass of nonelectrolyte solute dissolved in 315 g water with boiling point temperature of 100.45 ⁰C. The molar mass of solute is 46 g/mole

                          Kb = 0.52 ⁰C/m  and Tb = 100 ⁰C (boiling point of pure solvent)

Compound asked has a molar mass of 102.17 g(mol)^-1 and the following composition

Nitrogen gas, N_{2} can be prepared by passing gaseous ammonia over solid copper(II) oxide, CuO, at high temperature. The other products of the reaction are solid copper, Cu, and water vapor.

2NH3 (g) + 3CuO (s) → → N₂ (g) + 3Cu (s) + 3H₂O(g)

In a certain experiment, a reaction mixture containing 100.0 g CuO and excess amount of ammonia, NH 3 , yields 7.46 g N_{2} What is the percent yield for this experiment?

Calculate the wavelength of A muon (a subatomic particle with a mass of 1.884 ×

× 10^–25 g) traveling at 695 m/s:

An equation to show the enthalpy change for a strong and strong base which is -57.3kj