If you had 5.1 x 1024 molecules of H2O how many grams of H2O would you have? Be sure to show your work using dimensional analysis. Include your units. Show your answer in the correct number of significant figures.
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The excretory system, need answers for all: )

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.

Acompound has the molecular formula c3h8. which class of organic compounds does it belong to?