Why is fuel-cell technology, in its present state, not a pollution-free alternative to the internal combustion gasoline engine?

The molecular formula for caffeine is cshion402. which of the following elements is not found in caffeine?

8.98 dm3 of hydrogen gas is collected at 38.8 °c. find the volume the gas will occupy at -39.9 °c if the pressure remains constant.

Nthis lab, you will do experiments to identify types of changes. using the question format you learned (shown above), write an investigative question that you can answer by doing these experiments