Calculate the enthalpy of combustion for propane under three different conditions: (a) complete combustion with the theoretical amount of air (i. e. stoichiometric); (b) complete combustion with 20% excess air; (c) incomplete combustion with 20% excess air, where 90% (vol.) of the propane is consumed and the unburned portion remains in the products.

56.16 gregor mendel was the first scientist to use statistics to analyze scientific data. before mendel's experiments, scientists believed that organisms acquired traits from their environment and passed them on to their offspring. after mendel's discoveries were accepted, scientists realized that traits passed to offspring were the result of genes being passed from parents to offspring. this is an example of pls

If an area has high air pressure and low humidity, what type of weather will it most likely have? plz !

A50.0 ml sample of gas at 20.0 atm of pressure is compressed to 40.0 atm of pressure at constant temperature. what is the new volume? 0.0100 ml 0.325 ml 25.0 ml 100. ml