Chemistry 2 Cumulative Exam Review
Latest Update 100% Pass
What method does a centrifuge use to separate substances in a mixture?
It rotates a sample to separate based on density.
It rotates a sample to separate based on boiling point.
It heats a sample to separate based on density.
It heats a sample to separate based on boiling point.
✔✔It rotates a sample to separate based on density.
Which feature best defines an Arrhenius base?
It releases electrons to form a covalent bond.
It accepts protons from an acid.
It releases hydroxide ions when dissolved in water.
It forms a conjugate acid after a reaction.
✔✔It releases hydroxide ions when dissolved in water.
1
, What is the best description of mechanical energy?
Energy stored in chemical bonds.
Energy related to temperature.
The sum of an object's kinetic and potential energy.
Energy associated with electromagnetic waves.
✔✔The sum of an object's kinetic and potential energy.
Consider the following substances: one mole of beryllium, one mole of table salt, one mole of
water, and one mole of hydrogen. Which statement is true about their masses?
They all have the same mass.
They contain different numbers of particles.
They all have the same number of atoms.
Their masses are different.
✔✔Their masses are different.
Given the molar heat of fusion for water is 6.01 kJ/mol, what is the amount of energy released
when 36.8 grams of water solidifies at its freezing point? Use the formula q = nΔH.
2
Latest Update 100% Pass
What method does a centrifuge use to separate substances in a mixture?
It rotates a sample to separate based on density.
It rotates a sample to separate based on boiling point.
It heats a sample to separate based on density.
It heats a sample to separate based on boiling point.
✔✔It rotates a sample to separate based on density.
Which feature best defines an Arrhenius base?
It releases electrons to form a covalent bond.
It accepts protons from an acid.
It releases hydroxide ions when dissolved in water.
It forms a conjugate acid after a reaction.
✔✔It releases hydroxide ions when dissolved in water.
1
, What is the best description of mechanical energy?
Energy stored in chemical bonds.
Energy related to temperature.
The sum of an object's kinetic and potential energy.
Energy associated with electromagnetic waves.
✔✔The sum of an object's kinetic and potential energy.
Consider the following substances: one mole of beryllium, one mole of table salt, one mole of
water, and one mole of hydrogen. Which statement is true about their masses?
They all have the same mass.
They contain different numbers of particles.
They all have the same number of atoms.
Their masses are different.
✔✔Their masses are different.
Given the molar heat of fusion for water is 6.01 kJ/mol, what is the amount of energy released
when 36.8 grams of water solidifies at its freezing point? Use the formula q = nΔH.
2
