In a thin layer chromatography experiment, a plate of length 8.76 cm was used and a horizontal line was made at 1.09 cm above the bottom of the plate. After running the experiment (developing and drying), a spot was observed at 5.93 cm from the bottom of the plate, and the solvent front was 7.21 cm from the bottom of the plate. What is the Rf value?

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 atom with 7 protons, 6 neutrons, and 7 electrons has an atomic mass of amu. (enter a whole number.) numerical answers expected! answer for blank 1:

How do limiting factors most affect population size? ostop population growthrestrict population growthincrease population sizeresult in positive impactso