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The laser in an audio cd player uses light with a wavelength of 7.80* 10^2nm. Calculate the frequency of the light.
Important information about Liquid Crystals, Are there differences between the cholesteryl benzoates and the cholesteryl esters having long carbon chains?
2.00 moles of a gas occupies 62.2 L at a par- ticular temperature and pressure. Its density is 0.900 g/L. What is the molar mass?
An emission line in the hydrogen spectrum appears in the infrared region at 956 nm. What transition produced this line? Clearly indicate both nf and ni.
calcutate the molecular weight of surfur if 35.5 grams of sulfur dissolve in 100 grams of CS2 to produce a solution that has a boiling point of 49.48c.
Give some values of pressure and temperature at which you are sure that the substance called zinc exists in an equilibrium state as a) solid and b) vapor
A pressure measuring device indicates that the blood pressure of a normal person oscillates between 120 mm Hg (at the peak of the heartbeat) and 80 mm Hg (between heartbeats).
When a dilute solution of a weak base (Ka- 3.5*10^-9) is titrated with a 0.100 M solution of HCl at 25 C, the equilibrium constant for the titration reaction has this value:
Carbon monoxide gas reacts with hydrogen gas at elevated temperatures to form methanol according to this equation. CO(g) + 2 H2(g) CH3OH (g)
A 347 mL container holds 0.146 g of Ne and an unknown amount of Ar at 35°C and a total pressure of 630. mmHg. Calculate the moles of Ar present.
without special correlation. What is the range width of the actual number of people present at the Station at any given moment? (For concreteness, assume the fluctuations do not exceed one sigma)
For the decomposition of solid ammonium chloride into ammonia gas and hydrogen chloride gas Kp = 1.1 x 10-16. Calculate the change in standard free energy for this decomposition reaction.
Suppose that the volume of a particular sample of Cl2 gas is 8.7 L at 895 torr and 24 degrees Celsius. How many grams of Cl2 are there in the sample.
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