Artículos de esta sección

• Density of a substance (3661)

  8 de agosto de 2016 , por F_y_Q

  The volume of 200 g of a substance is 10 L. What is its density?

• Knowledge review: True or false questions (3114)

  25 de abril de 2015 , por F_y_Q

  Decide if these sentences are true or false and rewrite the false sentences correctly. Be careful because each mistake discounts a right answer:

  a) The density of a solution is equal to the mass of the solute divided by the volume of the solvent.

  b) The interaction between unlike charges is a repulsion force.

  c) Distillation is the method to separate miscible liquids.

  d) Decantation is the correct method to separate a mix of alcohol and water.

• General gas law: final volume of a gas (1927)

  5 de noviembre de 2012 , por F_y_Q

  Calculate the final volume of a gas at and 1.1 atm, when its volume is 3 L and the temperature and pressure are increased to and 1.3 atm.

• Defining pressure, heat and the Molecular Kinetic Theory for gases

  5 de noviembre de 2012 , por F_y_Q

  Define, with your own words, the following concepts:

  a) Pressure

  b) Heat

  c) Molecular Kinetic Theory for gases.