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How many grams of sucrose, C12H22O11, must be dissolved in 750. mL of water to prepare a 0.250 molal solution?
64.1 g
114 g
85.5 g
78.2 g
96.4 g
what advantage does using the Wiley extractor have over simply pouring acetone over the meat again and again?
An analysis had to be done in within and hour on a sample that clearly had a significant amount of water associated with it. Therefore, part of the sample was dried for an hour and part of the undried sample was assayed during the hour.
Propose a structure for the compound with the following formula that is consistent with the IR and 1H NMR data shown:
a large containerized planting that contains 79kg of soil. An analysis shows that you need to neutral 3.27 meq/100gof acidity. How much of finely ground pure CaCO3
An archeologist finds a huge monolith in the desert. In order to estimate the weight of this object; he estimates the dimensions of the monolith and removes some chips from the rock with his hammer.
Under certain conditions of temperature and pressure, 15.0 mL of a gas "Cb" with a molas mass of 56.0 g/mol effused through a pinhole in 30min.
Calculate the mass of methane that must be burned to provide enough heat to convert 151.0 g of water at 43.0°C
At equilibrium, 0.11 mole of CO2 was present. Calculate the equilibrium constant Kc of this reaction.
A 2.50 g sample of an unknown gas occupies 885 mL at 697 mm Hg and 40 C. What is the molar mass of the unknown gas
basketball with a volume of 3.50 Liters is left in a car when the temperature is 298 K. What will the volume of the ball be as the car heats up to 305 K during the day?
Determine the energies of ten lowest energy levels for this system.
An empty flask has a mass of 123.4 g. When the flask is filled with water, the mass is 211.6 g. If 10.0 g of zinc (d = 7.14 g/cm3) are added to the flask filled with water (and the sides of the flask are dried from the displaced water) what is the..
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