SALVAVIDAS I PERIODO

On the following section there are some questions with their answers. Before you read the answers try to do it by yourself!!!!!!!!

🧪EMPIRICAL AND MOLECULAR FORMULAS⚗️

Problem 1

Vitamin C (ascorbic acid) contains 40.92 % C, 4.58 % H, and 54.50 % O, by mass. The experimentally determined molecular mass is 176 amu. What is the empirical and chemical formula for ascorbic acid? 

Answer

Empirical: C3H4O3

Molecular: C6H8O6

Problem 2

What is the empirical formulate for isopropyl alcohol (which contains only C, H and O) if the combustion of a 0.255 grams isopropyl alcohol sample produces 0.561 grams of CO2 and 0.306 grams of H2O?

Answer

Empirical: C3H8O

If you don´t remember how to solve this kind of problems, you can read: https://chem.libretexts.org/Bookshelves/General_Chemistry/Map%3A_Chemistry_-_The_Central_Science_(Brown_et_al.)/03%3A_Stoichiometry-_Chemical_Formulas_and_Equations/3.05%3A_Empirical_Formulas_from_Analysis

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