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A mixture of He, Ar and Xe has a total pressure of 2.70atm. The partial pressure of He is 0.450atm as well as the partial pressure of Ar is 0.200atm. Explain what is the partial pressure of Xe?
Express your answer to three important figures and include the appropriate units.
A volume of 18.0 L contains a mixture of 0.250 mole N2 , 0.250 mole O2, and an unknown quantity of He. The temperature of the mixture is 0?C , as well as the total pressure is 1.00 atm . Explain how many grams of helium are present in the gas mixture?
Calculate the pH of the 0.20 M NH/0.26 M NHCl buffer. What is the pH after the addition of 20.0 mL of 0.050 M NaOH to 90.0 mL of the buffer solution? The Kb of ammonia is 1.8 x 10-5.
A 119.6ml sample of 0.110M methylamine (CH3NH2) is titrated with 0.255 M HNO3 . Calculate the pH after the addition of each of the following volumes of acid.
The influent BOD and TSS is measured as 225 mg/L and 250 mg/L, respectively. Explain what percent of removal the treatment plant has to achieve for BOD and TSS in order to meet the secondary effluent limit of 30 mg/L for both BOD and TSS? Explain ..
Balance the following chemical reaction using the lowest integer coefficients, in acidic conditions I?(aq) + BrO3?(aq) ? HIO(aq) + Br?(aq)
If 26mL of 5.2M H2SO4 was spilled, what is the minimum mass of NaHCO3 that must be added to the spill to neutralize the acid? 2NaHCO3+H2SO4=Na2SO4+2H2O+2CO2
If you start with 1.000 g of sulfur (S8) and obtain 4.963 g of pure compound. What is the empirical formula of this compound?
Calculate the concentration of HY3- in a solution prepared by mixing 10.00mL of .010M VOSO4, 9.9mL of .010M EDTA and 10.00mL of buffer with a ph of 4.00
In calibrating a drop counter, a student had an initial buret reading of 0.41 mL and a final buret reading of 4.71 mL after dispensing 75 drops from a buret.
Polly Esther determined the Ca2+ ion content of a 100 mL sample of calcium fortified orange juice. After adding 2.0 M HCl solution to the sample, she filtered the juice to remove the pulp and other particulate matter
An imperial cruiser fires its lasers at the rebel frigate 12X10^30 photons of 505nm wavelength slam into the frigate. The frigate was mostly constructed from high quality materials such as duranium a highly heat
Addition of bromine to 130 mg of trans-stilbene gave 200 mg of meso-dibromide. Calculate the percentage yield.
If Magnesium sulfate is a hydrate with the formula MgSo4**H2O 1.65grams out of a 3.38 gram sample of the pure hydrate remain after heating. Explain the formula of the hydrate
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