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Calculate the concentration of NH3 required dissolving 0.01 mol of AgCl in a liter of
solution. Ksp(AgCl) =1.56x10-10 Kdiss (Ag (NH3)2+) =6.8x10-8 ?
why would a cell need to have the option to make or not make protein?
Disulfide dichloride (S2Cl2) is used in the vulcanization of rubber, a process that prevents the slippage of rubber molecules past one another when stretched . It is prepared by heating sulfur in atmosphere of chlorine what is the theoritical yield of S2Cl2 in grams, when 4.06 g of S8 is heated with 6.24 g of Cl2? If the actual yield of S2Cl2 is 6.55 g. What is the percent yield?
Napoleon’s cannon, having a muzzle velocity of 126 m/s, is fired at a 0 degree angle off a cliff. The ball lands 739 m away from the cannon. How far above ground level is the cannon?
The area of a rhombus is 143m2. If the longer diagonal is 26m,
find the length of one side of the rhombus and its altitude.
2. Consider the following lines of Python code.
b = [23,44,87,100]
a = b[1:]
d = b[2:]
c = b
d[0] = 97
c[1] = 77
l. You loan from a bank the amount of P 100,000 with a rate of simple interest of 20% but the interest was deducted from the loan at the time the money was borrowed. If at the end of 1 year you have to pay the full amount of P 100 000 what is the actual rate of interest?
What are the similarities and the difference between:
i. a 1s orbitals and a 3s orbitals
ii. a 2px orbitals and 2pz orbitals
The highest energy electrons in an atom Q have the principal quantum number n = 4 and the angular quantum number l = 0. What is the maximum number of electrons present in atom Q?
Zinc sulphide (ZnS) has two common polymorphs which is sphalerite and wurtzite.
i. Diffrentiate the arrangement of ions in the sphalerite and wurtzite structure.
ii. By using your own illustration, briefly explain two most common atom orientations that generate close-packed lattice.
Miller indices form a notation system in crystallography for planes in crystal (Bravais) lattices. In particular, a family of lattice planes is determined by three integers.
a) Draw the following planes of Miller Indices in the given cubic lattice.
i. (0 1 1)
ii.(1 3 2)
iii.(1 0 2)
iv.(0 2 1)
v.(2 0 2)
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