Afarmer wants to determine if a new fertilizer gives a better crop yeild than her old fertilizer. she spreads the old fertilizer in field a, which crop had a brand new irrigation system. she spreads the new fertilizer in field b, which has a irrigation system that will be repaired next season. at the end of growing season, field a has a better yeild. the farmer determines that her old fertilizer is the better fertilizer. this an example of which of the following a. cultural bias b. personal bias c. data presentation error d. experimental bias

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.

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt

Building glycogen from glucose molecules is an example of