Q3: The active ingredient in bleach is A) Sodium hypochlorite B) Sodium chloride C)Sodium chlorate D)Sodium hydroxid Q4: Analysis of KClO3 Mixture Experiment: 2KCIO3(s)→2KCl(s) + 302(g) Oxygen gas was collected over water at 25°C. The following data was obtained: Volume of the collected gas Atmospheric pressure Vapor pressure of water at experimental temperature 62.7 ml 760 torr 23.4 torr Calculate the number of moles of KCIO3 in the sample. C) 2.89×10-3 A) 1.66 × 10-3 B) 4.97x 10-3 D)1.93×10-3 E) 2.48×10-³ Q5 A 0.750 g sample of finely ground limestone was placed in an Erlenmeyer flask, and 25.00 mL of 1.00 M HCI was added. The resulting solution was titrated against 0.50 M NaOH requiring 25.8 mL of the NaOH. What is the mass% of CaCO3 in the limestone (molar mass of CaCO3) = 100 g/mol? A) 80.7% C) 44.4% B) 90.1% D) 45.0% Q6: What is the molar mass of an Ideal gas if a 0.722g sample of this gas occupies a volume of 300 ml at 35 °c and 789 torr ? A) 70.13 B) 62.35 C) 60.89 D) 50.6 E) 58.7 Q7: A 0.54 g sample of a volatile liquid occupies 185 ml flask at 100 °C and 760 torr. What the molar mass of the volatile liquid (g/mol)? A) 98.3 D) 89.3 E) 97.2 B) CH4 C) H₂ D)O₂2 E) None of them 29: Which of the following factors affect the rate of a chemical reaction A) Catalyst B) concentration C) temperature D) nature of the reactants E) All of them B) 56.5 C) 79.2 Q8: The gas that evolves when HCl is added to the limestone is A) CO₂
Q3: The active ingredient in bleach is A) Sodium hypochlorite B) Sodium chloride C)Sodium chlorate D)Sodium hydroxid Q4: Analysis of KClO3 Mixture Experiment: 2KCIO3(s)→2KCl(s) + 302(g) Oxygen gas was collected over water at 25°C. The following data was obtained: Volume of the collected gas Atmospheric pressure Vapor pressure of water at experimental temperature 62.7 ml 760 torr 23.4 torr Calculate the number of moles of KCIO3 in the sample. C) 2.89×10-3 A) 1.66 × 10-3 B) 4.97x 10-3 D)1.93×10-3 E) 2.48×10-³ Q5 A 0.750 g sample of finely ground limestone was placed in an Erlenmeyer flask, and 25.00 mL of 1.00 M HCI was added. The resulting solution was titrated against 0.50 M NaOH requiring 25.8 mL of the NaOH. What is the mass% of CaCO3 in the limestone (molar mass of CaCO3) = 100 g/mol? A) 80.7% C) 44.4% B) 90.1% D) 45.0% Q6: What is the molar mass of an Ideal gas if a 0.722g sample of this gas occupies a volume of 300 ml at 35 °c and 789 torr ? A) 70.13 B) 62.35 C) 60.89 D) 50.6 E) 58.7 Q7: A 0.54 g sample of a volatile liquid occupies 185 ml flask at 100 °C and 760 torr. What the molar mass of the volatile liquid (g/mol)? A) 98.3 D) 89.3 E) 97.2 B) CH4 C) H₂ D)O₂2 E) None of them 29: Which of the following factors affect the rate of a chemical reaction A) Catalyst B) concentration C) temperature D) nature of the reactants E) All of them B) 56.5 C) 79.2 Q8: The gas that evolves when HCl is added to the limestone is A) CO₂
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Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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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.
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Transcribed Image Text:Q3: The active ingredient in bleach is
A) Sodium hypochlorite
B) Sodium chloride C)Sodium chlorate
D)Sodium hydroxid
Q4: Analysis of KClO3 Mixture Experiment: 2KCIO3(s)→2KCl(s) + 302(g) Oxygen gas was collected
over water at 25°C. The following data was obtained:
Volume of the collected gas
Atmospheric pressure
Vapor pressure of water at experimental temperature
62.7 ml
760 torr
23.4 torr
Calculate the number of moles of KCIO3 in the sample.
C) 2.89×10-3
A) 1.66 × 10-3
B) 4.97x 10-3
D)1.93×10-3
E) 2.48×10-³
Q5 A 0.750 g sample of finely ground limestone was placed in an Erlenmeyer flask, and 25.00 mL of 1.00
M HCI was added. The resulting solution was titrated against 0.50 M NaOH requiring 25.8 mL of the
NaOH. What is the mass% of CaCO3 in the limestone (molar mass of CaCO3) = 100 g/mol?
A) 80.7%
C) 44.4%
B) 90.1%
D) 45.0%
Q6: What is the molar mass of an Ideal gas if a 0.722g sample of this gas occupies a volume of 300 ml
at 35 °c and 789 torr ?
A) 70.13
B) 62.35
C) 60.89
D) 50.6
E) 58.7
Q7: A 0.54 g sample of a volatile liquid occupies 185 ml flask at 100 °C and 760 torr. What the molar
mass of the volatile liquid (g/mol)?
A) 98.3
D) 89.3
E) 97.2
B) CH4
C) H₂
D)O₂2
E) None of them
29: Which of the following factors affect the rate of a chemical reaction
A) Catalyst B) concentration C) temperature D) nature of the reactants E) All of them
B) 56.5
C) 79.2
Q8: The gas that evolves when HCl is added to the limestone is
A) CO₂
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