The molecular mass of a different compound was found to be 78, its empirical formula is CH. What is the molecular formula of the compound? Show your workings out. (relative atomic masses: C = 12, H = 1) (3)

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.

Question 5 match each term to its description. match term definition excess reactant a) reactant that can produce a lesser amount of the product limiting reactant b) reactant that can produce more of the product theoretical yield c) amount of product predicted to be produced by the given reactants

Which part of the mantle is similar to the crust ? (science)