Astudent did a simple and fractional distillation on a mixture of a and b. their starting mixture was 45.49% a. the first fraction of their simple distillation was 37.26% a and the first fraction of their fractional distillation was 12.14% a. how many theoretical plates did they have in their fractional distillation? type your numerical answer rounded to the 2nd decimal place (n. nn).

Problem page combustion of hydrocarbons such as pentane ( c5 h12 ) produces carbon dioxide, a "greenhouse gas." greenhouse gases in the earth's atmosphere can trap the sun's heat, raising the average temperature of the earth. for this reason there has been a great deal of international discussion about whether to regulate the production of carbon dioxide.(a) write a balanced chemical equation, including physical state symbols, for the combustion of liquid pentane into gaseous carbon dioxide and gaseous water. (b) suppose 0.350 kg of pentane are burned in air at a pressure of exactly 1 atm and a temperature of 20.0 degree c. calculate the volume of carbon dioxide gas that is produced.be sure your answer has the correct number of significant digits.

An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.

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