Categorize the following reaction: C3H8 + O2 ---> CO2 + H2O * Synthesis Reaction
Combustion Reaction
Replacement Reaction
Decomposition Reaction

What are the similarities of physical and chemical change ?

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?

100 grams of molten lead (600°c) is used to make musket balls. if the lead shot is allowed to cool to room temperature (21°c), what is the change in entropy (in j/k) of the lead? (for the specific heat of molten and solid lead use 1.29 j/g⋅°c; the latent heat of fusion and the melting point of lead are 2.45 × 104 j/kg and 327°c, respectively.)