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In Europe, gasoline efficiency is measured in km/L. If your car's gas mileage is 21.0 mi/gal, how many liters of gasoline would you need to buy to complete a 142 km trip in Europe? Use the following conversions: 1 km = 0.6214mi and 1gal = 3.78 L.
The half-lives of different radioisotopes are given in the table below. How long would it take (in minutes) for the amount of argon-44 to decrease from 28.0 mg to 3.50 mg?
Acetylene gas (C2H2) is produced as a result of the reaction CaC2(s)+2H2O(l)-> C2H2(g)+Ca(HO)2(aq) if 13g of CaC2 are consumed in this reaction, how much H2O is needed?
Calculate mass, mole fraction and avg. molecular weight of air, Calculate the constituent (a) mass, (b) mole fraction (c)average molecular weight of air at 25 degree centigrade, 1 atm, and molar density of all listed gases
when 142 grams of calcium flouride are reacted with an excess of sodium bromide, calculate the mass of calcium bromide formed.
An 11.0 gram sample of CaCl2(s) is dissolved in 125 grams of water with both substances at 25.0°C. If the final temperature of the mixture is 39.2 °C.
Calculate the theoretical yield when 7.0 ml of acetic anhydride
Which choice is closest to the longest wavelength that will remove an electron from the n=3 level of the hydrogen atom? (hint: what would you use for the value of nfinal when the electron is completely removed from the atom?)
What would be an appropriate reaction mechanism for these two reactions? Including electron transfer arrows.
If the pressure of the ocean breaks the submarine forming a bubble with a pressure of 250 atm pushing on it, how big will that bubble be?
A 24.0 mL soluton of 0.105 M CH3COOH is titrated with a 0.210 M KOH solution. Calculate the pH after the following additions of the KOH solution:
What is the exact reaction mechanism of the hydrolysis of maleic anhydride with heat followed by adding a zinc catalyst
A sample of gas occupies a volume of 50.4 mL. As it expands, it does 125.5 J of work on its surroundings at a constant pressure
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