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What is the molality of a solution labebeled 8.6 % glucouse by weight?
Calculate the molar solubility of Al(OH)3 in a solution that is slightly basic with a pH of 9.50.
Enter your response in scientific notation, e.g. enter 2E3 for 2000.
Find the formal charge of each atom in the given compounds/polyatomic ion.
a. HBr
b. N₂0
c. SO₄²⁻
How does the standard hydrogen electrodes works?
What are the differences between the standard reduction potential and standard oxidation potential?
Which of the following is a conjugate acid-base pair?
A. F– and HCO3–
B. F– and H2CO3–
C. HF and F–
D. HF and H2CO3–
A solution with a pH of 5.0 ______.
A. has a hydrogen-ion concentration of 5.0 M
B. has a hydrogen-ion concentration of 1 x 10-5 M
C. is basic
D. is neutral
1. Which statement below is NOT consistent with the Kinetic Molecular Theory (KMT) *
A. There is space between particles.
B. Matter is made of particles that are constantly in motion.
C. The amount of kinetic energy in a substance is related to its temperature.
D. Phase changes do not happen when the temperature of the substance changes sufficiently
2. Which of the following solutes will cause the highest elevation in the boiling point?
A. NaCl
B. KNO3
C. CaCl2
D. Table Sugar
1. Which is not a colligative property? *
A. Freezing point depression
B. Boiling point elevation
C. Osmotic Pressure
D. Vapor pressure
2. Which is correct about the boiling point of a 1 m aqueous solution of sucrose (342 g/mol) and a 1 m aqueous solution of ethylene glycol (62 g/mol)? Considering that both solutions are non-electrolyte. *
A. sucrose solution boils at higher temperature as it has more solute particles than ethylene glycol solution
B. ethylene glycol solution boils at higher temperature as it has less solute particles than sucrose solution
C. exhibit the same boiling point because each solution has one mole of solute particles (molecules) per kilogram of solvent.
D. ethylene glycol solution and sucrose solution when exposed at higher temperature has both equal amount of solute particles per kilogram of solvent.
1. Which is not true about entropy? *
A. It is denoted by the symbol S
B. It is a measure of the randomness or disorder of a system.
C. It is a measure of how much energy is unavailable for conversion into work.
D. A positive value of a change in entropy indicates that the final state is less random than the initial state.
2. What happens to water molecules when cooled? *
A. The forces between molecules break.
B. The water molecules become excited.
C. The water molecules slide past each other.
D. The water molecules become fixed in position.
3. Which of these is a reason why surface area of reactants is increased? *
A. To stabilize the reaction
B. To speed up the reaction
C. To prevent a compound from forming
D. To produce lesser amount of products
4. Which of these is a reason why surface area of reactants is increased? *
A. To stabilize the reaction
B. To speed up the reaction
C. To prevent a compound from forming
D. To produce lesser amount of products
