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35.0 grams of an unknown sugar was dissolved in water and the final volume of the solution was brought up to 1.00 L. The osmotic pressure of this solution was determined to be 2.50 atm at 25°C. Which of the sugars below was most likely the unknown sugar?
A. none of these
B. glucose (C6H12O6)
C. sucrose (C12H22O11)
D. ribose (C5H10O5)
How many grams of O2 are needed to react with 18.5 grams of Mg? 2 Mg(s) + O2(g) → 2 MgO(s)
volumetric flask and this solution becomes quite warm, but after it is permitted to return to room temperature, H 2 O is combined to total 500 mili litres of solution. Compute the pH of the final solution. ?
Sketch a cylinder with ten molecules of helium (He) gas. The cylinder has a movable piston. Label this sketch before. Make an after sketch to represent
What combustion products are produced when materials made from polyacrylonitrile smolder and burn?
Use Le Chatelier's principle to explain the color change which you observed after the addition of distilled water to the equilibrium mixture above.
consider the combustion of methane, CH4:CH4 + 2 O2 (g) -->CO2(g) + H2O suppose 1.5 mol of methane is allowed to react with 4 mol of oxygen what is the limiting reagent?
A 0.0355 g sample of an unknown molecular compound is dissolved in 1.000 g of liquid camphor at 200.0°C. Upon cooling, the camphor freezes at 157.7°C. Calculate the molar mass of the unknown compound.
For the decomposition of sodium bromide: NaBr = Na(s) + 1/2Br2(liquid) the change in Gibbs Free Energy (delta G) is 349 KiloJoules What is the free energy of formation of NaBr(solid)?
The molar heat of fusion of water is 6.01 kj/mol. How much heat energy is required to melt one ice cube in a soft drink to form liquid water a 0 degree celcius, if the ice cube has a mass of 18.9 g?
If you fill the larger tank with oxygen to a pressure of 135 , to what pressure should you fill the acetylene tank to ensure that you run out of each gas at the same time? Assume ideal behavior for all gases.
A mixture of C3H8 and C2H2 has a mass of 2.0 . It is burned in excess O2 to form a mixture of water and carbon dioxide that contains 1.5
Determine which of them exhibit resonance. (In other words, which of the following molecules exhibit resonance? Note: there is more than one answer and you must choose all of the molecules in the list that exhibit resonance.)
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