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In an experiment similar to the molar volume lab you did using potassium chlorate, a sample of oxygen gas was collected over water at 22 ºC. The volume occupied by the gaseous mixture (oxygen plus water vapor) is 0.650 L and the total pressure is 754 torr.
a. Calculate the partial pressure of oxygen. (Hint: See Table C4, page A-25 in Appendix for the vapor pressure of H2O at 22 ºC.)
b. Calculate the grams of oxygen collected.
Complete combustion of 3.90 g of a hydrocarbon produced 12.0 g of CO2 and 5.54 g of H2O. What is the empirical formula for the hydrocarbon?
Given a solution containing 0.01M of lead chloride and 0.01M of lead chromate, calculate the concentration of Pb2+. Using the Ksp(PbCl2)=1.7x10^-5 and Ksp(PbCrO4)=1.77x10^-14. What is the solid remaining?
What is the molecular orbital theory. How does it differ from valence bond theory
An exothermic reaction liberates 7.58 kJ of heat in a coffee cup calorimeter containing 157 grams of solution. The temperature of the solution in the calorimeter increases by 11.2°C. How much heat was absorbed by the calorimeter? Assume the specif..
In a reaction, 82.00 g of sodium reacts with 74.00 g of ferric oxide to form sodium oxide and iron metal. Calculate the mass of solid iron produced
The radius of a gold atom is 144 pm. How many gold atoms would have to be laid side by side to span a distance of 2.63 mm?
When are covalent bonds most likely to form? a. between 2 atoms with a high ionization energy b. between 2 with a low ionization energy. c when one atom high and other low d. no correct choice. (I'm leaning towards a.)
A solution contains 0.10 M I- and 0.10 M CO32-. In an attempt to separate the ions, Pb(NO3)2 is slowly added to the solution. (a) Identify the precipitates that could form and predict which precipitate will form first.
he Ksp of AgCl at 25 oC is 1.6 x 10-10. Consider a solution that is 1.0 x 10-5 M CaCl2 and 1.0 x 10-5 M AgNO3. 1. Q Ksp and a precipitate will form.
Ethane enters furnace at 0.9 kg/min and burns with 200% excess air. 50% of fuel is consumed and combustion is assumed complete (meaning no CO is produced). Find the flow rate of Oxygen, Nitrogen,
the pressure of a sample of gas at 10.0 c increases from 700. mm hg to 900. mm hg. what is the new
What is the molarity of ZnCl2 (aq) that forms when 15.0 g of zinc completely reacts with an aqueous solution of Copper (ii) chloride.
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