How many grams of propane are in 20 pounds of propane? use the conversion 1 lb = 454 g. (express your answers for the next three questions in scientific notation. for example use 2.3e-5 to indicate a number such as 2.3 x 10-5.) 9.1e3 grams b) how many moles of propane are in 20 pounds of propane? 2.1e2 moles c)how much heat can be obtained by burning 20 pounds of propane? (remember to look at this from the viewpoint of the surroundings, since the question asks how much heat can be obtained.) 4.6e5 kj

Under what conditions will a gas be most likely to exhibit the ideal gas properties predicted by the ideal gas law? 1)high pressures and high temperature, because particles are forced closer together with higher kinetic energy, so intermolecular forces of attraction are weaker 2)high pressure and low temperature, because particles are forced closer together and moving slower, so the volume of the particles is less significant 3) low pressure and high temperature, because particles are spread farther apart and moving faster, so the intermolecular forces of attraction are weaker 4)low pressure and low temperature, because particles are spread farther apart with lower kinetic energy, so the volume of the particles is less significant