If a catalyst were added to the reaction of crystal violet with sodium hydroxide, list three properties/characteristics of the reaction that are likely to change

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 a number added in front of a formula in order to balance the equation

In a ball-and-stick molecular model, what do the sticks represent?