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Dissolving 4.64g of an impure sample of ca carbonate in Hcl produced 1.09L co2 measured at 20 degree at 747mmhg. Calculate the % of mass of carbonate in sample..
What pair of elements would you expect to exhibit the greatest similarity in physical and chemical properties? WHY?
For a Voltaic Cell involving Pb as the anode and Ag as the cathode, what would be the initial voltage of the cell if the initial concentration of Pb2+ was 0.5M and Ag+ was 0.1M
A voltic cell with an aqueous electrolyte is based on the reaction between Cd2+ (qu) and Mg(s), producing Cd (s) and Mg2+. Write a balanced cell reaction.
helium-oxygen mixtures are used by divers to avoid the bends and are used in medicine to treat some respiratory
Calculate the freezing point of 0.15 m calcium chloride aqueous solution. Assume that the molal freezing point depression constant of water is 1.86°C•kg/mol and that the freezing point of water is 0.00°C.
How many photons strike the CD surface during the playing of a CD 69 minutes in length?
determine the number of molecules of acetaminophen in a 500 mg
a 8.0-l sample of helium is held at constant pressure. if the temperature is changed from 41 degrees c to 35 degrees c
A sample of oxygen gas has a volume of 387 mL at a temperature of 15.3 C What temperature (in C) is required to change the volume to 439 mL under constant pressure
Consider a glass of 167 mL of water at 29°C. Calculate the mass of ice at -15°C that must be added to cool the water to 10°C after thermal equilibrium is achieved. To find the mass of water use the density of water = 1.0.
Calculate the molar mass of the unknown gas. (Remember that the faster the rate of effusion, the shorter the time required for effusion of 1.0 L; that is, rate and time are inversely proportional.)
A J tube is filled with air at 22C and 760 Torr. The long arm is closed off at the top and is 100 cm long. The short arm is 40 cm. Mercury is poured into the short arm with a funnel. What is the pressure on the air when Hg starts to spill out.
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