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What is the density of an aqueous solution of potassium nitrate, that has a normal boiling point of 103.0 degrees Celsius, and an osmotic pressure of 122 at 25 degrees Celsius?
How many moles of dinitrogen tichloride correspond to 645 mg of dinitrogen trichloride? How many nitrogen atoms would be required to produce that amount of dinitrigen trichloride.
It is burned in excess O2 to form a mixture of water and carbon dioxide that contains 1.5 times as many moles of CO2 as of water. Find the mass of C2H2 in the original mixture.
The molar volume of the liquid at this temperature and pressure is 163.3 cm^3/mol. At 100 atm the melting temp changes to 351.26 K. Calculate the enthalpy and entropy of fusion of the solid.
the ph for a 2.6 moll propanoic acid solution was 2.24. what is thenbspkanbspof propanoic acid given that propanoic
a liquid unknown was found to be soluble in cyclohexane and alcohol the unknown was found to have a boiling point of 58
at 25 degrees celsius the first-order rate constant for a reaction is 2.0x103 s-1. the activation energy is 15.0 kjmol.
Oxygen is composed of only one kind of atom and can't be separated into simpler substances. What type of matter is it
How many different kinds of polypeptides, each composed of 12 amino acids, could be synthesized using the 20 common amino acids?
What is the pressure (in atm) exerted by a 2.00 mole sample of gas that occupies 2.50 L at 307.15K? The value of R = 0.0821 L atm mol - 1 K - 1 .
the temperature of a sample of helium at 85 kpa is 37 degrees celsius. if the volume of the gas remains constant at
For the first-order reaction below, the initial concentration of A is 0.240 M. If the concentration of A decreases to 0.0800 M after 21.8 hours, what is the half-life of the reaction
Each uranium atom that decays eventually results in the formation of one lead atom. Assuming that the rock did not contain any lead-206 atoms originally, find the age of the rock when the ratio of uranium to lead atoms is 8 to 1.
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