Chemistry Quiz EYU

What does "mass/volume %" mean in a solution?

• Mass of solute per 100 mL solution

• Volume of solute per 100 mL solution

• Mass of solute per 100 g solvent

• Volume of solute per 100 g solvent

What is the mass of solute in a 0.45% (mass/vol) solution with 1000 mL volume?

• 0.45 g

• 4.5 g

• 45 g

• 450 g

What happens to the solubility of gases in liquids when the temperature increases?

• Increases

• Decreases

• Remains constant

• Depends on the gas

What principle explains why polar solutes dissolve in polar solvents?

• "Like dissolves like"

• "Opposites attract"

• "Temperature effect"

• "Pressure principle"

Which substance is least soluble in water at 50°C?

• NaCl

• KCl

• KNO₃

• Li₂SO₄

What is the pH of a neutral solution?

• 0

• 7

• 14

• None of the above

What does the "pH scale" measure?

• Concentration of solute

• Acidity or basicity

• Temperature of a solution

• Pressure of a gas

If two forces of 40 N act in the same direction, what is the net force?

• 0 N

• 40 N

• 80 N

• None of the above

Which force system results in equilibrium?

• Unbalanced forces

• Zero net force

• Increasing force magnitude

• None of the above

What term describes liquids that mix homogeneously?

• Immiscible

• Miscible

• Nonpolar

• Polar