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how to solve quantum mechanics eqn schrondier eqn..
- Suppose a gas expands by 500ml aganist a pressure of 1.20 atm and no heat is exchanged with the surrounding during the expansion. How much work is done in the expansion
You have been introduced to terms like Bravais lattice translations and
Wycko↵ positions. Write down all such possible translations. Are they
true only for cube or are they true for all the seven crystal systems?
Explain.
Consider two FCC structures whose Wycko↵ positions are given by (a.)
(0,0,0) for one of these, and by (b.) (0,0,0), ( 1/4,1/4,1/4) for the other. At all
the possible positions, same type of atoms are decorated/placed. Can
you give examples (one each) for such structures? Draw them. How
many number of lattice points will one see in both these structures?
How many number of atoms per lattice point do you have in them?
A 25 mL syringe is used to measure both 10 mL of a solution and 20 mL of a solution. Which measurement, if any, has the biggest percentage error?
- Measurement of 10 mL.
- Measurement of 20 mL.
- Both have the same percentage error, as it is the same syringe.
When dividing 7.1 by 6.346, the result on the calculator is 1.118815. Round the answer to the appropriate precision based on the precision of the numbers in the division column.
35.6 ± 0.4 mL of 0.600 ± 0.02 M HCl was required to neutralize 35 ± 0.3 mL of a solution of NaOH.
Calculate the error in the concentration of NaOH in M from the combined errors in the data.
Liquid oxygen for use as a rocket fuel can be produced by cooling dry air to
–183ºC, where the O2 condenses. How many liters of dry air at 25ºC and 750 torr would need to be processed to produce 150 L of liquid O2 at –183 ºC? (The mole fraction of oxygen in dry air is 0.21, and the density of liquid oxygen is 1.14 g/mL).
