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A sample of gasoline was run through the GC yielding several peaks indicating the components that made up the gasoline mixture. Uncertain of the amount of benzene in the gas, a pair of students taking instrumental analysis does an experiment using internal standards. Their results are as follows:
Standard solution of 10ppm of benzene and 10ppm toluene yield relative signals(Curve areas) of 1350:960.They then add 5 ml of a 20 ppm toluene to 5 ml of the unknown solution and relative signals of 1240:1100.
What is the concentration in ppm of the benzene?
A metal bulb is filled with 10.2 g of CHCl3 and 0.322 g of CH4 (two gases). What is the total pressure in the bulb if the temperature is 345 C and the volume is 50.0 mL.
How many grams of Cu(OH)2 will precipitate when excess NaOH solution is added to 73.0 mL of 0.661 M CuBr2 solution
The GMC Sierra 15 Hybrid 2WD, a hybrid electric vehicle, has an EPA gas mileage rating of 23.0 mi/gal on the highway. How many kilometers can the Sierra 15 Hybrid 2WD travel on the amount of gasoline
Estimate the average rate of production (Using this rate) of oxygen over the same time period. Considering the given equation 2H 2 O 2 --> 2H 2 O+O 2 -H 2 O 2
what are the lewis dot structures for k2so4 ca3n2 c6h14 c2h4 ch3ch2
a student ran the following reaction in the laboratory at 736 kn2g 3 h2g 2 nh3gwhen she introduced 3.63e-2 moles of
consider the reaction in which 410g of Ca(NO3)2 react with just the right amount of magnesium metal in a single replacement reaction. how many grams of lithium are required?
How many minutes will it take to plate out 2.19 g of chromium metal from a solution of Cr3+ using a current of 35.2 amps in an electrolyte cell
the freezing point of the resulting solution is 3.77 degrees C. The freezing point of pure benzene is 5.48 degrees C and Kf for benzene is 5.12 degrees C/m. Calculate the molar mass of the unknown compound.
flask of nitrogen is collected over water at a total pressure 765.0 mm Hg. If the partial pressure of the water vapor is 25.0 mm Hg, what is the pressure exerted by the nitrogen?
The half-life for the radioactive decay of [U]-238 is 4.5 billion years and is independent of initial concentration.
What is the partial pressure of argon, in torr, in a container that also contains neon at 147 torr and is at a total pressure of 536 torr?
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