[CHM113] 113DQ4

# [CHM113] 113DQ4 - Discussion Quiz#4(10 points Section AA/AB...

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Discussion Quiz#4 (10 points) Name____________________ Section AA/AB Section__________________ 1. Ammonium nitrate is used as a nitrogen fertilizer. What is the %composition (% by mass) of nitrogen in this compound? (4 points) 2. A compound of sulfur and oxygen is 59.9% oxygen by mass. What is the empirical formula of this compound? (3 points) 3. Write a balanced chemical equation when magnesium reacts with iron (II) sulfate. (use the activity series chart) (1 point) 4. Suppose 11g of a mixture of sodium bicarbonate and sodium chloride is assigned in lab and you find that it contains 4g of sodium chloride. Could this mixture be used for industrial purposes (industries that use sodium bicarbonate as raw material)? Explain your answer with numerical proof. (2 points)

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Discussion Quiz #4 (10 pt) Name: ____________________ CHM 113 AC, AD Section: ___________________ 1. Isopropyl alcohol is composed of C, H and O. Combustion of 0.510g of this alcohol produces 1.122g of CO 2 and 0.612g of H 2 O. Hence, we find that the alcohol has 0.306g of C, 0.068g of H, 0.1354g of O. Determine the empirical formula of isopropyl alcohol. (4 points) 2. In a likely (or unlikely) event, CO 2 and H 2 O combine to form carbonic acid (H 2 CO 3 ), how much of this acid is produced. Assume that 3.7g of CO 2 and 1.4g of H 2 O is available. (3 points) 3. If 10g of sodium bicarbonate and sodium chloride mixture is given to you, and it is heated to a temperature which is greater than temperature at which sodium bicarbonate decomposes but not sodium chloride. It was found that 1.46g of CO 2 was released. Can this mixture be used for industrial purposes? Explain your answer clearly showing numerical proof, if any. (3 points)
Discussion Quiz #4 (10 pt) Name: ____________________ CHM 113 AE, AF Section: __________________ 1. Caproic acid is composed of C, H and O. Combustion of 0.225g sample of this acid produces 0.512g of CO 2 and 0.209g of H 2 O. We also know that the acid has 0.1396g of C and 0.0234g of H. What is the empirical formula of caproic acid? (4points) 2. What is the percent mass composition of oxygen and hydrogen in magnesium acetate? (3 points) 3. When 12.5g of the mixture (Investigation 11) is used in a local bakery to prepare cakes, it was found that only 0.5g of CO 2 was produced when this mixture was heated to a temperature at which only sodium bicarbonate decomposed. How much sodium bicarbonate was actually present in the mixture? Considering the current industrial standards, is it beneficial to use this mixture for commercial purposes? Explain your answer clearly showing numerical proof, if any. (3 points !

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Discussion Quiz #4 (10 pt) Name: ____________________ CHM 113 AG TA Name: ___________________ 1. Isopropyl alcohol is composed of C, H and O. Combustion of 0.510g of this alcohol produces 1.122g of CO 2 and 0.612g of H 2 O. Hence, we find that the alcohol has 0.306g of C, 0.068g of H and some amount of O. Determine the empirical formula of
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## This note was uploaded on 08/12/2008 for the course CHM 113 taught by Professor Anbar during the Spring '06 term at ASU.

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[CHM113] 113DQ4 - Discussion Quiz#4(10 points Section AA/AB...

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