Which of the following is NOT a combination reaction? a NO + O2 + NO2
b Cr + Cl2 + CrCl3
C CH, + O2 + CO2 + H20
d C2H4 + H2 + C2H6

There is an area in idaho named craters of the moon where most of the ground is covered with basalt, adark gray, igneous rock with no visibl crystals. what can you infer about the geographical history of the area?

6what is the importance of water on earth? a) it keeps the top layer of the geosphere cool b) it allows life to exist c) it provides ice at the poles d) it creates earth's blue color from space

Which of these conditions most likely produces an unstable isotope?