The apparent activation energy for the chemical reactions which produce light in a firefly is 50. kJ mol-1. How many times slower would you expect the firefly to blink if you cooled down its surroundings from 300. K to 270. K

If a 60-g object has a volume of 30 cm3, what is its density? 2 g/cm3 0.5 cm3/g 1800 g * cm3 none of the above

As a part of an experiment a student burns propane to produce carbon dioxide and water she remembers that she must follow the law conservation of matter when writing a balanced chemical equation which of these equation adheres to the law of conservation of matter

Which one of the following gases is not an important component of soil?