Rivera needs 3.1 mol of caffeine (C8H10N4O2) to get the proper jumpstart to his Monday morning. How many grams of caffeine does his coffee need?​

What layer of the atmosphere is directly above the troposphere?

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?

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