e age of

Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter18: Nuclear Reactions
Section: Chapter Questions
Problem 32QAP
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PROBLEM SOLVING: Express your answer to the nearest fourth decimal places. Show complete
solution. Box your final answer.
1. A wooden object found in an Indian burial grouncd and subjected to radiocarbon dating.
The decay rate associated with C-14 is 10 aisintegrations per minute per gram carbon.
What is the age of the object?
2. Co-60 is used extensively in radiotherapy as a source of y-rays. Its half-life is 5.27 years.
a) How many years will it take to decrease to 35% of its original activity?
b) If a cobalt source is ten years old, what percent of its original activity remains?
3. A 1.50 g sample of a compound containing only C.H and O was burned completely. The
only combustion products were 1.738 g CO, and 0.711g of water. What is the empirical
formula and molecular tormmula of the compound? (MW = 152 g/mol)
4. 100 kmoles of Heptane is burned with 40% excess air. Sevenly percent reacts to form CO2
and the rest reacts to form CO. Find the composition of the flue gas.
5. Determine the cell potential of the folowing system:
a)
Pb/PBSO//Pb2-/Pb
b) Fe"/Fe3*//MnO4/Mn2+
Transcribed Image Text:PROBLEM SOLVING: Express your answer to the nearest fourth decimal places. Show complete solution. Box your final answer. 1. A wooden object found in an Indian burial grouncd and subjected to radiocarbon dating. The decay rate associated with C-14 is 10 aisintegrations per minute per gram carbon. What is the age of the object? 2. Co-60 is used extensively in radiotherapy as a source of y-rays. Its half-life is 5.27 years. a) How many years will it take to decrease to 35% of its original activity? b) If a cobalt source is ten years old, what percent of its original activity remains? 3. A 1.50 g sample of a compound containing only C.H and O was burned completely. The only combustion products were 1.738 g CO, and 0.711g of water. What is the empirical formula and molecular tormmula of the compound? (MW = 152 g/mol) 4. 100 kmoles of Heptane is burned with 40% excess air. Sevenly percent reacts to form CO2 and the rest reacts to form CO. Find the composition of the flue gas. 5. Determine the cell potential of the folowing system: a) Pb/PBSO//Pb2-/Pb b) Fe"/Fe3*//MnO4/Mn2+
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