Is each of the following a physical or chemical property? ● melting point ● ability to react ● color ● density ● ability to burn ● ability to rust ● magnetism ● boiling point ● hardness ● conductivity is each of the following a physical or chemical change? ● a puddle evaporating ● adding food coloring to water ● cutting an apple ● denting a piece of metal ● dry ice sublimating ● iron rusting ● limewater (a liquid) and carbon dioxide (a gas) forming chalk (a solid) ● paper burning ● vinegar and baking soda making bubbles ● water boiling

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