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A 10 mL sample of a solution of Pb(ClO3)2 was diluted with water to 21 mL. A 10 mL sample of the dilute solution was found to contain 0.021 moles of Pb2+. What was the concentration of Pb(ClO3)2 in the original undiluted solution?
A sample of gas has a volume of 1.55 L at 35 °C and 1.05 atm. What is the pressure (in torr) if the volume changes to 1.38 L and temperature to -28 °C.
The atmospheric sulfur dioxide concentration over a certain region is 0.12 ppm by volume. Calculate the PH of the rainwater due to this pollutant. Assume the dissolution of SO2 does not affect its pressure.
What proportions of ethanol and water should be mixed in order to produce 100 cm3 of a mixture containing 50 percent by mass of ethanol.
The dipole moment of SO2 and CO2 are 5.37x10-30 C.m and zero, respectively. What can be said about the shapes of the two molecules.
If 500 mL of air contains 2 x 1022 particles (atoms and molecules), how many particles do you inhale in one day if you breathe 15000 L of air?
Draw the most stable conformation of trans-1-isobutyl-4-methylcyclohexane in both the chair conformation and the wedge structure.
a student heated a .546 gram pure chemical in an atmosphere of oxygen gas until it had completely reacted the final chrominum compound weighed .798 grams what is the empirical formula of this compound?
How much heat (in kJ) is evolved in converting 1.00 mol of steam at 160.0 degrees Celcius to ice at -45.0 C? The heat capacity of steam is 2.01 J/g and of ice is 2.09 J/g.
The mixture of saltwater and ice around the ice cream bucket in the ice cream machine is at a temperature of -8.40C. What mass of sodium chloride would be found in 1,477 grams of this solution?
Calculating Pressures using different laws, Converting between Units of Pressure, Part A, Convert 0.700atm of pressure to its equivalent in millimeters of mercury.
Drag the flask and drop it on the lower half of the burette to connect them. Open the Data window and click on the flask. Click the Pushpin icon in the blue bar of the Data window to lock its display to the flask's contents.
Assume that a reaction takes place at 296 K and 306 K. What must the activation energy be for the rate constant to double as described.
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