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Potassium chlorate (KClO3) was heated to give oxygen.
2KClO3 (s) ? 2KCl (s) + 2O2 (g)
A volume of 550mL of gas was collected over water at 21oC and an atmospheric pressure of 743 Torr. The vapor pressure of water at 21oC is 19 Torr. How many moles of oxygen were collected?
Indium has only two naturally occurring isotopes. The mass of indium-113 is 112.9041 and the mass of indium-115 is 114.9039 .
Butane (C4H10) is burned to completion in air. How many moles of air are used for each mole of butane if 18% excess oxygen is used
experiment to determine delta H of solution, would you expect to get a larger, smaller or identical temperature change? why?
The temperature in the laboratory was 25°C, and the barometric pressure was 740 mmHg. At 25°C, the vapor pressure of water is 23.8 mmHg. Calculate the equivalent mass, EM, of the unknown metal anode. The student was told the metal was oxidized to ..
A solution of nacl in water was electrolyzed with a current of 2.50 amps for 15.0 min. How many millimeters of 0.100m hcl would be required to neutralize
Calculate the concentration of Na+ ions (in mol/L) for each of the following. a) A 41.0 mL sample of 2.0 M Na3PO4 which has been diluted to 300.0 mL b) 8.50 g Na2CO3•5H2O(s) is made up in a total volume of 3.50 L
Containers of rubbing alchohol and ammonia are opened simultaniosly in a room. Which will you smell first and why?
A 22.0 mL sample of vinegar, which is an aqueous solution of acetic acid, HC2H3O2 , requires 24.5 mL of 0.450 M NaOH to reach the endpoint in a titration. What is the molarity of the acetic acid solution
Write a brief discussion of the bond dipoles of iodomethane and the corresponding Grignard reagent.
What is the partial pressure of He in a container that is at a total pressure of 2.33 atm and contains
below, 8.34 atm each of H2 and Br2 were placed into a 1.00 L flask and allowed to react: H2(g) + Br2(g) 2 HBr(g) Given that Kc = 86.7, calculate the equilibrium pressure of Br2.
Ethylene glycol,C2H4(OH)2, is a colorless liquid used as automobile antifreeze. If the density at 20 degree Celcius of a 4.028m solution of ethylene glycol in water is 1.0241g/mL, What is the molarity of the solution
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