The chlorine has formed the trichloride ion when combining with the metal. 5. Suppose that you used hydrobromic acid to dissolve calcium instead of hydrochloric acid. What would you expect for the ratio of dried salt (CaBr) to metal? Express your answer as a single decimal number such as 3.22 6. Estimate the ratio of mass of scandium chloride to scandium metal. Express your answer as a single decimal number such as 3.22. 7. You dissolve some bismuth metal in HCl and dry it. The ratio of mass of salt to metal is 1.25. Which of the following could be the salt? Select the answer that gives the best numerical agreement to the data. BICI BICI BIOCI Bi203 8. You dissolved some gold in aqua regia and dry it carefully. You weigh the resulting Auciz (auric chloride). After heating for some time to 200 C, the mass decreases by 2.53 g. Heating auric chloride to a sufficiently high temperature will cause it to decompose into aurous chloride (AUCI) and chlorine gas. What is the original mass of gold that was dissolved. Express your answer as a single decimal number such as 3.22. 9 Answers Graphs Units Calculations Trig Submit EXTEND 1. What is an empirical formula? O A guess at a formula. A formula with correct atomic ratios O A formula from the days of alchemy. O A formula that fits the data. 2. If you lost some metal while transferring it from the balance to the evaporating dish, how would your empirical formula be affected? increase chloride decrease chloride no change in chloride 3. A chemist reacts mercury with hydrochloric acid and gets a ratio of 1.18 for the mass of salt to the mass of mercury. What is the most likely empirical formula for the metal chloride formed? Hgci HgCl2 Hg2CI 4. After dissolving a metal in hydrochloric acid and evaporating, you observe a much smaller increase in mass than you expected. What is a likely reason for the small increase? The atomic mass of the metal is very small The molecular formula for the compound formed has a large subscript for the metal. During evaporation, HCl is driven off, and your metal forms an oxide. The chlorine has formed the trichloride ion when combining with the metal