An archeological artifact has a carbon-14 decay rate of 2.75 dis/min·gc. if the rate of decay of a living organism is 15.3 dis/min·gc, how old is this artifact? assume that t1/2 for carbon-14 is 5730 yr.1.42 × 104 yr1.209 × 10−4 yr6.16 × 103 yr1.03 × 103 yr

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.