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Consider 100.0-g samples of two different compounds consisting merely of carbon and oxygen. One compound contains 28.4 g of carbon, as well as the other has 44.2 g of carbon. Explain how can these data support the law of multiple proportions if 44.2 isn't a multiple of 28.4?
Explain why it is unwise to use column chromatography on compounds having boiling points below about 150 °C (760 torr)
Some water dissolves in liquid methane at -161 degrees C, the boiling point of liquid methane, to give a solution in which the mole fraction of water is 6*10^-5. Determine the mass of water (in units of grams) dissolved in 115L of this solution if..
Calculate the entropy change for each of the following reactions. Justify why these are physically reasonable answers.
what mass of sodium chloride would need to be added to the blood to bring the sodium ion concentration up to 0.137 m
The energy we get in nuclear reactions comes from ____ A) the sun. B) water. C) energy we put into the reactor. D) work we do on the reactor. E) the mass of the fuel.
A gas originally at 27 degrees celsius and 1.00 atm pressure in a 3.9 L flask is cooled at constant pressure until the temperature is 11 degrees celsius. determine the new volume of the gas and express your answer in Litre.
Firefly luciferase is the enzyme that allows fireflies to illuminate their abdomens. Because this light generation is an ATP-requiring reaction, firefly luciferase can be used to test for the presence of ATP.
Explain what would be the effect on your calculated copper if some blue color remained when you acidified your solution
The half-life of the radioactive isotope bismuth-210 is 5.01 days. How many days will it take for the mass of a sample of bismuth-210 to decay from 56.4 milligrams to 14.1 milligrams
To produce 856 g of ammonia gas utilizing air as your source of nitrogen gas, explain what volume of air is required if the air is introduced at 27°C and 760 mmHg. Define the mole fraction of nitrogen gas in air is 0.781
a spectrophotometer was calibrated with a 6.1times10-4 m in cu cu-neocuproine solution. this calibration was carried
Use standard heats of formation and absolute entropies to calculate the equilibrium pressure (atm) PCO2 at 340 K.
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