A large petroleum spill has covered a group of animals with petroleum oil. Wich of this sustance can be used to remove the petroleum off of the animals? Carbon tetrachloride
Hydrogen chloride
Ammonia
Sodium chloride ​

Which type of orbits are found in the principal energy level n = 2 a - s b - s, f c - s, d d - s, p e - s, p, d

Which set of characteristics best describes igneous rock? a) largest type of rock, made of organic matter, hardest type of rock b) least abundant type of rock, made of other rocks, made mostly of minerals c) found on all continents, contains wavy bands of stripes, contains fossils d) most abundant type in earth's crust, made of magma/lava, contains no fossils

What is the independent variable in this investigation? mass volume sample number substance density