The table shows the percentages of hydrocarbons that are found in a sample of crude oil. hydrocarbons percentage paraffins 30 naphthenes 49 aromatics 15 asphaltics 6 based on the given information, what is the best classification for this sample of crude oil?

How many grams of phosphorus are contained in 5.09 moles of phosphorus?

Select the correct answer. wax is a nonpolar substance. in which type of substance is it most soluble?

Which best describes the activation energy of a chemical reaction? a. the combined energy of all the reactants b. the amount of energy required for a reaction to occur c. the difference in energy between products and reactants d. the potential energy stored in the bonds of reactants and products