laws

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    Homework help - gas laws and stoichiometry!

    A candle is burnt inside a sealed container of oxygen gas with a volume of 1500 cm3 at 25oC. Once the reaction is complete and the container has cooled to 25.0oC, what will the pressure be inside the container? Assume the candle has no volume, that all the oxygen is consumed, that candle wax has...
  2. A

    AP chemistry gas laws problem

    The question is: The density of liquid nitrogen is 0.808g/mL at 77K. What volume of nitrogen gas at STP must be liquefied to make 10L of liquid nitrogen? What I've attempted is the following, but I know it's wrong because I checked the answer key. (dRT)/P=molar mass (808g/L • 0.08206 • 77)/ P =...
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    Reaction Rate Laws vs. Pressure

    Hey guys, So, my Chemistry teacher gave us a test, and one of the questions sparked heated debate among every student in the class. The question asked "What is the affect on "k" when increasing pressure?" The equation we were dealing with was Rate = k [A] [B]. Now, I understand increasing...
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    Reaction Rate Laws of Bleaching

    So, I am working on my chemistry post-lab report and I'm having some difficulty with the math portion. Here is a quick run down of the experiment. We performed 2 experiments, (Reaction 1 and Reaction 2). Rxn 1: Mix 1mL dye, D.I. water and NaOCl into vile & measure absorption/time Rxn 2: Mix...
  5. S

    Chemistry- Gas Laws

    A .1142 g Zn-Al sample is dissolved in acid and gives 130.76 mL H2 gas when measured over water at 21 degrees C and 75.59 cm Hg barometric pressure. The vapor pressure of water is 18.650 torr. The density of water at 21 degrees C is .997995 g/mL. Calculate: a. Pressure of H2 gas in atm. b...
  6. S

    Gas Laws

    A 0.1164 g Zn-Al sample is dissolved in acid and gives 125.85 mL H2 gas when measured over water at 22.8 degrees C and 751.9 mm Hg barometric pressure. The vapor pressure of water is 21.0 torr at this temperature. (R = 0.08206 L atm/(K mol)). Calculate: a. Pressure of H2 gas in atm. b. Moles...
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    Problem with gas laws & partial pressure

    You don't have to help me on all of these problems... a few will definitely help 2. An owner of a scuba diving company wishes to fill a 100L tank with a gas mixture for divers to breathe underwater. The owner hires a chemist to perform this task. The chemist weighs the tank and gets a mass...
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    Chemistry: Gases: Gas laws questions

    NOTE: The question is only this paragraph below, the rest is just my steps that are incorrect. A fish has neutral buoyancy (doesn’t sink or float upwards) when its density is the same as the water surrounding it. In water with density 1.0026 g/mL, a 1.182 kg fish has neutral buoyancy when its...
  9. S

    Rate laws vs. Reaction rate

    Suppose you have a reaction aA + bB --> C Well, suppose the rate law of the reaction is r = k [A][B] with arbitrary powers on the [A] and the [B]. My question is, does 'r' give you the rate at which [A] is consumed, or the rate at which [B] is consumed (assuming they are distinct)? If...