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A tennis ball contains 250mL of air at 1.25atm. A tennis star soupsit up by injecting 50mL of air at 1 aim into the ball.
Assuming no change in volume of the ball, what is the final pressure in atmosphere?
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0.394 mol of a solid was dissolved in 340 mL of water at 26.9 oC. After the solid had fully dissolved, the final temperature of the solution was 31.6 oC. What is the molar heat of solution of the substance?
N2O5 decomposes following first order kinetics. If 75% of the original sample of N2O5 has decomposed after 2240 minutes, what is the value of k, the rate constant, at this temperature(in min-1)?
A 1.526 g sample of a polymer dissolved in 1.00 L of a benzene solution at 22°C has an osmotic pressure of 4.52 x 10-2 atm. What is the molar mass of thepolymer?
How is vacuum filtration completing the purification of your sample? Where are the impurities at this point? For a recrystallization lab in organic chemistry
What is the subshell electron configuration for the Ca20 atom? Which are valence electrons and how many valence electrons are there?
Explain why the mass of the crucible and anhydrous salt is less than the mass of the crucible and the hydrate. What is the chemical formula of copper (II) sulfate?
A 1.000 g sample of copper metal is heated in a crucible and after 15 minutes themass of the crucible contents is 1.111 g. Calculate the mass of copper (II) oxide that was produced.
One liter of nitrogen (N 2 ) and one liter of carbondioxide (CO 2 ), initially at one atmosphere pressure, are forcedinto a single evacuated 500 mL vessel. What is the total pressure, in atmospheres,if the temperature re ...
The mass of a sample of CaCO3 is 751 grams How many total atoms are present in this sample?
A student is doing the experiment Chemical Formulas of Copper Sulfide by heating copper with excess of sulfur at very high temperatures using a Bunsen burner. Copper and sulfur react stoichiometrically and excess of sulf ...
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