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a 16.0 ounce specially drink contains 349 mg caffeine. what is the concentration of caffeine in this solution? one fluid ounce is equivalent to 29.57ml. the formula for caffeine is c8H10N4O2
Assuming that the calibration curve passes through the origin, what absorbance would be recorded for a solution with a Pb(NO_3_)_2_ concentration of 0.335 M.
The heat fusion for water is 80. cal/g. How many calories of heat are released when 20 g of water is at 0 C is frozen to ice ?
If the density of N2 gas in a rigid flask is 0.243 g/L at 18 °C, what is the pressure of nitrogen in the flask if it is heated to 36 °C
the minimum concentration of the gas, in air, below which there is too little fuel to support combustion; For propane, the LFL is 2.1 mol-%; What is the mol fraction of propane in the air at the stoichiometric concentration?
Identify the steric number, shape, hybridization about the central atom and molecular polarity of sulphuryl chloride, SO2Cl2.
Describe at least 4 methods that could be used to attempt to separate the oil and water at home. Based on the four methods postulate which method would work better than the others.
write the overall equation for the reaction b. Give a detailed reaction mechanism for the reaction showing all steps and intermediates
Consider H2, D2, and H20, treated as ideal gases at pressures of 1 atm and temperatures of 293.2 K.
When an aqueous solution of sodium sulfite is added to an aqueous solution of hydrobromic acid, a gas evolves. Write the balanced chemical equation
A 1.00-L gas sample at 100.°C and 589 torr contains 50.0% helium and 50.0% xenon by mass. What are the partial pressures of the individual gases?
the pressure exerted on a 240 mL sample of hydrogen gas at a constant temperature is increased from .428 atm to .724 atm. What will the final volume of the sample be.
Consider the following reaction: 2A + B → 3C + D If 63.0 mol A and 42.0 mol B react to form 54.0 mol C. What is the percent yield of this reaction.
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