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A chemistry student needs 40.0 mL of pentane for an experiment. By consulting the CRC Handbook of Chemistry and Physics, the student discovers that the density of pentane is 0.626 g cm^3. Calculate the mass of pentane the student should weigh out.
20.00 ml of 0.100F Pb(No3)2 (FW 331.2) are mixed with 15.00 ml of 0.125 F Nal (FW 149.9). Lead (II) and iodide form an insoluble salt pbl2 (FW 461.0) Calculate the concentration of each of the remaining ions after mixing. [Pb+2], [i-],[na+],[n03-]..
For the following reaction if the rate of disappearance of O2 is 0.0450 mol L-1s-1, what is the rate of formation N2O5(g)?
What is the mole fraction of solute and the MOLAL (MOLALITY NOT MOLARITY!!!!!) concentration for an aqueous solution that is 14.0% NaOH by mass
Calculate the Calorimeter Constant if 25 g of water at 60C was added to 25 g of water at 25C with a resulting temperature of 35C?
a bag of potato chips contains 585 ml of air at 25degc and a pressure of 765 mm hg. assuming the bag does not break
The mixture was stirred, causing all of the sample to dissolve. The excess HCl in the solution required 94.9 mL of 0.128 M NaOH for complete neutralization in a titration. What was the molecular formula of the white substance
the temperature of the resulting solution rises from 25.00°C to 37.90°C. If the specific heat of the solution is 4.18 J/(g · °C), calculate ?H for the reaction, as written.
Compound A, C6H10O2, is optically active. It dissolves slowly in aqueous NaOH, consuming one equivalent of base. When the solution is acidified, A is slowly regenerated.
What is the molarity of a solution that contains 60.0 of vitamin B1 hydrochloride (molar mass = 337 ) in 180 of solution?
The balloon then drifted up into the Earth's atmosphere. Assuming the air pressure does not change, determine the volume of that helium balloon when it is 10km above Earth, where the atmospheric temperature is -53 degrees Celsius.
A balloon filled with 5.00 L of He is under 3.00 atm of pressure at 315 K. What will happen to the volume of the gas if the temperature drops to 255 K and the pressure changes to 1.50 atm.
A student wrote the reaction scheme below for the grignard synthesis of triphenylmethonal. Explain to the student why this representation of the reaction would not yield the desired product
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