Chemistry Answers

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

10.567 g sample of HCl required 75.45 ml of 0.9785 M of Sodium Hydroxide in titration,compute for percent purity

a solid 6.45 - cm square cube is made with a material that has a density of 1.13 g•cm^-3 . Calculate the centigram mass of this cube. Recall that the volume of a cubic shape is defined as the product of length x width x height

Directions. Solve the following problems. Show your solutions.

I. For the voltaic cell, 2 Na(s) + Fe2+(aq) → 2 Na+

(aq) + Fe(s)

a) Write the two half-reactions.

b) Write the cell notation.

c) Calculate E ° for the cell.

II. Consider the fission reaction 1

0n + 235

92U →

89

37Rb + 3 0

-1e + 3 1

0n + 144

58Ce

How much energy in kilojoules is released per gram of Uranium- 235?

III. For Al-28, calculate the binding energy in kilojoules /mol?

IV. Sketch a portion of the acrylonitrile polymer ( Refer to Table 23.1) assuming it is a

a) head-to-tail polymer

b) head-to-tail, tail-to-tail polymer