1. Problem 1 Total 4000 yellow legos 2000 black legos 1200 blue legos 400 orange legos Write analogous empirical and molecular formula Y w Bk x Bu y O z Hint 1: How did you decide on the lowest ratio of Boys to Girls in the people demo?

2. Problem 1 Total 4000 yellow legos 2000 black legos 1200 blue legos 400 orange legos If there were four butterflies, what is the “molecular formula”, aka how many of each colored lego was present in the butterfly. Y w Bk x Bu y O z

3. Problem 2: The compound sold under the name Prozac is 66.01% C, 5.87% H, 18.43% F, 4.53% N and 5.17% O. What is the empirical formula? Hint: Get numbers of each atom. Compare them (divide by the smallest) like we did in the example with your fellow students moving around.

4. Problem 3: a) Determine the empirical formula of the compound. b) The molar mass was found to be 170.12 g/mol. What is the molecular formula of gallic acid ? c) What would the formula be if the mass was found to be 510 g/mol ? A folk medicine used in the Anhui province of China to treat acute dysentery is cha-tiao-qi, a preparation of the leaves of Acer ginnala. Reaction of one of the active ingredients in cha-tiao-qi with water yields gallic acid, a powerful antidysenteric agent. Gallic acid is known to contain carbon, hydrogen and oxygen. A chemist wanting to determine the molecular formula of gallic acid burned 1.000g of the compound in an elemental analyzer. The products of the combustion were 1.811 g of CO 2 and 0.3172 g of H 2 O.

5. Problem 3 a) Determine the empirical formula of the compound. How many mols of C are present? How many mols of H are present? How many mols of O are present? What is the empirical formul? A folk medicine used in the Anhui province of China to treat acute dysentery is cha-tiao-qi, a preparation of the leaves of Acer ginnala. Reaction of one of the active ingredients in cha-tiao-qi with water yields gallic acid, a powerful antidysenteric agent. Gallic acid is known to contain carbon, hydrogen and oxygen. A chemist wanting to determine the molecular formula of gallic acid burned 1.000g of the compound in an elemental analyzer. The products of the combustion were 1.811 g of CO 2 and 0.3172 g of H 2 O.

6. Problem 3 b) The molar mass was found to be 170.12 g/mol. What is the molecular formula of gallic acid ? If the empirical formula is C 7 H 6 O 5. What is the empirical mass? A folk medicine used in the Anhui province of China to treat acute dysentery is cha-tiao-qi, a preparation of the leaves of Acer ginnala. Reaction of one of the active ingredients in cha-tiao-qi with water yields gallic acid, a powerful antidysenteric agent. Gallic acid is known to contain carbon, hydrogen and oxygen. A chemist wanting to determine the molecular formula of gallic acid burned 1.000g of the compound in an elemental analyzer. The products of the combustion were 1.811 g of CO 2 and 0.3172 g of H 2 O.

7. Problem 3 c) What would the formula be if the mass was found to be 510 g/mol ? A folk medicine used in the Anhui province of China to treat acute dysentery is cha-tiao-qi, a preparation of the leaves of Acer ginnala. Reaction of one of the active ingredients in cha-tiao-qi with water yields gallic acid, a powerful antidysenteric agent. Gallic acid is known to contain carbon, hydrogen and oxygen. A chemist wanting to determine the molecular formula of gallic acid burned 1.000g of the compound in an elemental analyzer. The products of the combustion were 1.811 g of CO 2 and 0.3172 g of H 2 O.