Solve the following problem, show all you work. Circle or underline your final answer. 1.Analysis of 20.0g of a compound containing only calcium and bromine indicates that 4.00 g of calcium are present. What is the empirical formula?

1. and 2. question: in which equation? or i don't understand you, 3. a), 4. c), 5. c), 6. b), 7. d), 8. d) if small number is underlined(behind symbol) , b) if big number is underlined(in front of symbol)9. what is underlined there? 10. c)

The correct answer is c b c a d

Ido not understand.