Which pair consists of a molecular formula and its corresponding empirical formula?
(1) c2h2 and ch3ch3 (3) p4o10 and p2o5
(2) c6h6 and c2h2 (4) so2 and so3

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