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Where we isolated caffeine from tea bags using extraction, drying, evaporation, and sublimation. Wanted to know what would happen to the caffeine if the sublimation step were performed at atmospheric level.
Find out the electron -group arrangement, molecular shape, and ideal angles for each of the following (a)SO42- (b)NO2- (c)PH3
how do you calculate the vapor pressure of water above a solution prepared by dissolving 34.9 g in glycerin c3h8o3 to
What is delta H rxn/mol Mg for the following reaction. Mg + 2HCl -> MgCl2 + H2 if 0.158 g Mg reacts in 100.0 mL of solution and changes the temperature from 25.6 °C to 32.8 °C
The normal melting points and boiling points of xenon are -112 deg. Celsius and -107 deg. Celsius, respectively. The Xe triple point is at -121 deg. Celsius and 282 torr, and its critical point is at 16.6 deg. C and 57.6 atm.
the thermal decompositon of n205g to form n02g and o2g is a first order reaction. the rate constant for the reaction
calculate the molar mass of naphthalene, the organic compound in "mothballs," if a solution prepared by dissolving 5.00g of naphthalene in exactly 100g of benzene has a freezing point 2.00 degrees celcius below that of pure benzene.
Calculate the mean free path and the binary number of collisions per liter per second between HI molecules at 300 K and 1.00 atm. The collision diameter of the HI molecules may be taken to be 5.10 A. Assume ideal-gas behavior.
A 370. mL air sample collected at 35°C has a pressure of 550. torr. What pressure will the air exert if it is allowed to expand to 425 mL at 49°C.
what is the density of an object having the mass of 8.09 an volume of 25
Calculate the amount of heat (in kj) required to heat 2.75 kg of water from 13.20 degrees celsius to 46.32 degrees celsius
a sample of propanec3h8 contains 10.8 moles of carbon atoms. how many total moles of atoms does the sample
What is the minimum amount of energy from the sun required to produce 5 g of glucose in this way? ?Hf of glucose is -1260 kJ/mol.
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