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1. Heliox is a helium-oxygen mixture used in scuba diving. At 298K in a 16.0 L tank, the partial pressures of helium and oxygen are 18.5 atm and 0.413 atm, respectively.
a. Calculate the total pressure of the gas mixture.
b. Calculate the mole fractions of each component of the mixture.
c. Calculate the mass of each component in the mixture.
2. At STP, air can be considered a mixture of ideal gases: 21.0% O2, 78.0% N2, and 1.00% Ar by volume.
a. Calculate the partial pressure of each gas at STP.
b. Briefly explain Dalton's law of partial pressures, using the kinetic theory of gases.
c. Calculate the density of air in g L-1 at STP.
A gas sample was collected over water at 25.3 degrees C. The total pressure is determined to be 0.97 atm. What is the partial pressure of the gas that was collected
What is the ratio between HCO3- and HCO3H to produce a buffer with a pH of 6.5? Ka of HCO3H is 7.94 x 10-7.
Offer the experimental procedure necessary to make the subsequent solution- 10.00mL of a 0.0300M solution of CH3COOH from a stock solution with a concentration of 0.0780M
Lead(II) phosphate, Pb3(PO4)2 (s), is allowed to come to equilibrium with its ions in otherwise pure water. Ksp = 3.0 x 10?44. Calculate the equilibrium concentration of each ion.
What is meant by heating to constant mass*? How, in the lab, can you determine if the sample in the test tube has attained constant mass?
When a solution of barium nitrate and a solution of sodium carbonate were mixed, 10.00 g of barium carbonate was isolated.
A 0.2861 gram sample of an unknown acid (HX) needed 32.63 mL of0.1045 M NaOH for neutralization to a phenolphthalein endpoint. Explain what is the molar mass of the acid. If this unknown acid had the formula H2X
Create a 7-step procedure you can use to determine those cation/anion pairs that produce precipitates. Make sure you include all equipment and amounts of materials you expect to use.
If some air remained in your syringe along with the natural gas sample, would that make your result greater or less than the actual molar mass of natural gas? is the same true for your sample of unknown gas?
A rigid tank with a volume of 2.5 m3 contains 15 kg of saturated liquid-vapor mixture of water at 75 0C . The water is heated. Determine the temperature at which the liquid in the tank is completely vaporized.
when a pure sample of tert-butyl bromide is analyzed by gas chromatography two components are usually observed. one of
Describe the bonding in N3- (Azide ion) in terms of an molecular orbital picture in which each terminal N atom is sp hybridized with one hybrid orbital accommodating one lone pair of electrons
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