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
Chemistry
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Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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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
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