gas laws

  1. M

    Yet Another moles/gas law question :( Please Help me :D

    Hi all, sorry to ask another question but this is for an assignment and I can't leave them blank :( A small amount of zinc granules were reacted with an excess of dilute HCL according to the following equation: Zn(s) + 2HCl(aq) --> ZnCl2(aq) + H2(g) The hydrogen gas produced was collected...
  2. M

    Chemistry Moles and Gas Law Question? Please Help?

    Hi! So the question is: Hydrochloric acid of concentration 2.0 mol dm^-3 is used to descale a kettle containing 25 grams of scale (calcium carbonate) (i) what volume of water containing 0.002 ml dm^-3 calcium hydrogen carbonate Ca(HCO3)2 would need to be boiled to produce this amount of...
  3. C

    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...