Name the following compound:

CH2 ≡ CH2

Ethyl
Ethyne
Ethane
ethane

An empty fuel tank can still contain and therefore can be even more dangerous than one full of liquid fuel.

  the mississippians were considered to be  horticulturalists, which means they were

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.