Match the time frame listed on the left with the characteristic listed on the right
Paleozoic era
?
Age of the dinosaurs
End of the
Mesozoic era
?
Most of Earth a desert
Mesozoic era
?
A layer of iridium
deposited all over Earth

For ai it's atomic number is 13 and it's mass number is 27 how many neutrons does it have

Many pharmaceutical drugs are organic compounds that were originally synthesized in the laboratory. which two scientific disciplines are bridged by pharmaceutical drugs? chemistry and forensics chemistry and medicine biology and forensics biology and criminology

In vapor-liquid equilibrium in a binary mixture, both components are generally present in both phases. how many degrees of freedom are there for such a system? the reaction between nitrogen and hydrogen to form ammonia occurs in the gas phase. how many degrees of freedom are there for this system? steam and coal react at high temperatures to form hydrogen, carbon monoxide, carbon dioxide, and methane. the following reactions have been suggested as being involved in the chemical transformation: