A 0.7221-g sample of a new compound has been an- alyzed and found to contain the following masses of
elements: carbon, 0.2990 g; hydrogen, 0.05849 g;
nitrogen, 0.2318 g; oxygen, 0.1328 g. Calculate the
empirical formula of the compound.

What are the percent by mass of copper in penny lab

Label a-f based on the table using c for concentrated and d for dilute

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.