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A deep sea diver uses a gas cylinder with a volume of 10.0L and a content of 52.1g of O2 and 32.7g of He. Calculate the partial pressure of each gas and the total pressure if the temperature of the gas is 21 degrees Celcius.
A standard basketball has a volume of 7.47 L. What is the volume of the basketball in gallons? The speed limit on many United States highways is 65.0 miles per hour
Estimate the approximate concentration of a typical enzyme and the number of the enzyme molecules inside each cell? Make any reasonable assumption that will help you calculate the numbers
A sample of air at 15 psi is compressed at constant temperature from 555ml to 275ml. Calculate the resulting pressure.
Two scientists are experimenting with pure samples of isotope X, a highly radioactive substance. The first scientist has a sample with a mass of 20 grams.
suppose that a 5.0X10^-5 M solution of Ba(OH)2 is prepared. What is the pH of the solution?
Following the equation for the combustion of 2C3H6O+8O2----->6CO2+6H2O+853.6 kcal. How much heat will be given off if 0.48 mol of acetone is burned completely?
A sample of an ideal gas at 1.00 atm and a volume of 1.89 L was placed in a weighted balloon and dropped into the ocean. As the sample descended, the water pressure compressed the balloon and reduced its volume.
35 mL air sample collected at 31 C has a pressure of 575 torr. What pressure will the air exert if it is allowed to expand to 476 mL at 56 ? C? Answer in units of torr.
A vertical force of 7 N (in the negative z direction) is required to hold the deflector in place. Determine the mass (kg) of the deflector. Assume the velocity of the water remains constant.
What is the molarity of a solution that is 7.00% by mass magnesium sulfate and has a density of 1.071.
How many grams of dry NH4Cl needed to be added to 1.50L of a 2.00M solution of ammonia NH3 to prepare a buffer solution that has a pH of 8.60?
Chemical bottles labeled to contain blue-coloured NISO4 -6H20 often contain instead the green-coloured NISO4-7H2O.
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