The test tube containing some amount of MnO2 and the mixture of KCIO3-KCl is weighed as 7.200 g. This tube is heated to decompose KCIO3 thermally. When all O2 gas is evolved and the test tube is cooled, the tube is weighed as 5.600 g. What is the mass of KCIO; and KCl at the beginning? (KCIO3: 122.55 g/mol, KCI: 74.55 g/mol, O2: 32 g/mol) A 2 KC1O3(s) → 2 KCl(s) + 3 O2(g) A. KCIO3: 4.085 g, KCl: 3.115 g B. KCIO3: 2.085 g, KCl: 5.115 g C. KCIO3: 3.085 g, KCl: 4.115 g D. KCIO3: 6.085 g, KCl: 1.115 g E. KCIO3: 5.085 g, KCl: 2.115 g The decrease in the weight of test tube containing some amount of MnO2 and the mixture of KCIO3- KCl after heating is 3.2 g. According to the thermal decomposition reaction of KCIO3, what is the mass of KCIO3 in the beginning mixture? (KCIO3: 122.55 g/mol, KCl: 74.55 g/mol, O2: 32 g/mol) 2 KC1O3(s) → 2 KCl(s) + 3 O2(g) А. 2.08 g В. 5.89 g С. 4.32 g D. 8.17 g Е. 3.84 g
The test tube containing some amount of MnO2 and the mixture of KCIO3-KCl is weighed as 7.200 g. This tube is heated to decompose KCIO3 thermally. When all O2 gas is evolved and the test tube is cooled, the tube is weighed as 5.600 g. What is the mass of KCIO; and KCl at the beginning? (KCIO3: 122.55 g/mol, KCI: 74.55 g/mol, O2: 32 g/mol) A 2 KC1O3(s) → 2 KCl(s) + 3 O2(g) A. KCIO3: 4.085 g, KCl: 3.115 g B. KCIO3: 2.085 g, KCl: 5.115 g C. KCIO3: 3.085 g, KCl: 4.115 g D. KCIO3: 6.085 g, KCl: 1.115 g E. KCIO3: 5.085 g, KCl: 2.115 g The decrease in the weight of test tube containing some amount of MnO2 and the mixture of KCIO3- KCl after heating is 3.2 g. According to the thermal decomposition reaction of KCIO3, what is the mass of KCIO3 in the beginning mixture? (KCIO3: 122.55 g/mol, KCl: 74.55 g/mol, O2: 32 g/mol) 2 KC1O3(s) → 2 KCl(s) + 3 O2(g) А. 2.08 g В. 5.89 g С. 4.32 g D. 8.17 g Е. 3.84 g
General Chemistry - Standalone book (MindTap Course List)
11th Edition
ISBN:9781305580343
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Chapter21: Chemistry Of The Main-group Elements
Section: Chapter Questions
Problem 21.200QP
Related questions
Concept explainers
Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
Question
Transcribed Image Text:The test tube containing some amount of MnO2 and the mixture of KclO3-KCl is weighed as 7.200
g. This tube is heated to decompose KCIO; thermally. When all O2 gas is evolved and the test tube is
cooled, the tube is weighed as 5.600 g. What is the mass of KCIO; and KCl at the beginning? (KCIO;:
122.55 g/mol, KCl: 74.55 g/mol, O2: 32 g/mol)
A
2 KC1O3(s)
2 KCl(s) + 3 O2(g)
A. KCIO3: 4.085 g, KCl: 3.115 g
B. KC1O3: 2.085 g, KCl: 5.115 g
C. KCIO3: 3.085 g, KCl: 4.115 g
D. KCIO3: 6.085 g, KCl: 1.115 g
E. KCIO3: 5.085 g, KCl: 2.115 g
The decrease in the weight of test tube containing some amount of MnO2 and the mixture of KCIO3-
KCl after heating is 3.2 g. According to the thermal decomposition reaction of KCIO3, what is the
mass of KCIO3 in the beginning mixture? (KCI03: 122.55 g/mol, KCl: 74.55 g/mol, O2: 32 g/mol)
A
2 KCIO3(s)
→ 2 KCl(s) + 3 O2(g)
A. 2.08 g
В.
5.89 g
С. 4.32 g
D.
8.17 g
Е. 3.84 g
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Recommended textbooks for you
General Chemistry - Standalone book (MindTap Cour…
Chemistry
ISBN:
9781305580343
Author:
Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:
Cengage Learning
Living By Chemistry: First Edition Textbook
Chemistry
ISBN:
9781559539418
Author:
Angelica Stacy
Publisher:
MAC HIGHER
Chemistry & Chemical Reactivity
Chemistry
ISBN:
9781337399074
Author:
John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:
Cengage Learning
General Chemistry - Standalone book (MindTap Cour…
Chemistry
ISBN:
9781305580343
Author:
Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:
Cengage Learning
Living By Chemistry: First Edition Textbook
Chemistry
ISBN:
9781559539418
Author:
Angelica Stacy
Publisher:
MAC HIGHER
Chemistry & Chemical Reactivity
Chemistry
ISBN:
9781337399074
Author:
John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:
Cengage Learning
Chemistry: An Atoms First Approach
Chemistry
ISBN:
9781305079243
Author:
Steven S. Zumdahl, Susan A. Zumdahl
Publisher:
Cengage Learning
Chemistry for Engineering Students
Chemistry
ISBN:
9781337398909
Author:
Lawrence S. Brown, Tom Holme
Publisher:
Cengage Learning
Chemistry by OpenStax (2015-05-04)
Chemistry
ISBN:
9781938168390
Author:
Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:
OpenStax