A common medicine has the percent by mass composition of 59.94% carbon, 4.48% hydrogen and the remainder oxygen. What is the empirical formula for this common molecule

Compare and contrast physical changes with chemical changes.

Which of the following are sources of revenue for media companies? a. direct sales to producers b.advertising and subscriptions c. online purchase d. capital investments

The chemical equation below shows the reaction of sodium (na) and chlorine (cl) to form sodium chloride (nacl). 2na + cl2 → 2nacl in this equation, which of the following is a reactant? i. sodium ii. chlorine iii. sodium chloride