Chemistry Answers

Determine the Oxidation States of each element of the reaction below:

Ag (s)+H2S →Ag2S(g)+H2(g) Ag(s)+H2S→Ag2S(g)+H2(g)

The oxidation of ammonia into nitric acid is an exothermic process.

4NH3+5O2=4NO+6H2O Hrxn=-904.4 kj

How will the following conditions affect after the equilibrium of the system?

a. Adding more O2

b. Adding H2O

c. Removing NH3

d. Increasing the temperature of the system

e. Decreasing the pressure in the vessel

(pls answer by alphabet)

Consider the Given Reaction:

2BrF5=BR2+5F2

If the perspective equilibrium concentrations of BrF5,Br2,and F2 at 250 Celsius are 0.046M,1.2M,and O.93M, what are the values of kc and kp?

How Lmao moles of KCl can be produced by letting 4 moles of KClO3 react

Determine the boiling point and freezing point of the following solutions:

5.00g caffeine (C8H10N4O2) and 250.0 ml water.

0.300 kg chloroform (CHCl3) and in 21.0 g eucalyptol (C10H18O).

Determine the osmotic pressure of the solution made by dissolving 25.0 g of sodium chloride in 2.0 L of solution at 25 0C.

Reserpine is a natural product isolated from the roots of the shrub Rauwolfia serpentine. It was first synthesized in 1956 by Nobel prize winner R.B Woodward. It is used as a tranquilizer and sedative. When 1.00g reserpine is dissolved in 25.0g camphor, the freezing point depression is 2.63 0C. Calculate the molality and the molar mass of reserpine.

38. 45. KA weather balloon will burst when the volume exceeds 1.4 m². If it must rise to a height of 15 000 m above sea

level where the atmospheric pressure is 30 kPa at -50 °C. (0.56 L)

PA

Ti

a. What volume of helium should be placed in the balloon at sea level (SATP conditions) so that the balloon will just

rise to the desired level?

b. Will it matter if the balloon is filled at the top of a mountain or at sea level? Explain.

Electron scattering by isolated atoms and molecules occurs in the gas phase. It plays a key role in plasma physics and chemistry and it's important for such applications as semiconductor physics.

Electron scattering experiment provides most accurate values of the sizes of atomic nuclei.

Estimate the rough energy of electron required for this.

Ans: ~250 MeV

Note: The electron must be treated as relativistic

Consider two normalized eigen functions and , corresponding to the same eigen value. If

Integral a1a2*dT = d

where is real

Find a normalized linear combinations of and that are orthogonal to

(a) a1

(b) a1+a2

Note: The coefficients of the linear combinations need not be real