Mid-Term Exam (Part 1)

99% of all matter in the universe can be classified as

Which of the following is an endothermic phase change?

A mixture that appears to contain only one substance is a (n)

According to Dalton, when elements combine in a compound

The phase change that is the reverse of sublimation is

To find the number of neutrons in an atom, you would subtract

Forces of attraction limit particles the most in

During which phase change will the arrangement of molecules become most orderly

If the volume of a cylinder is reduced from 8 to 4 L, the pressure of the gas will change from 70 kPa to

If the number of particles of gas is increased, pressure will

Filtration can be used to separate mixtures based on

Water is a compound because it

Which of the follwing factors affects the pressure of an enclosed gas?

Democritus thought that matter was made of tiny particles

When a physical change occurs, which of the following does not change

During which of the following chemical changes does a precipitate form?

Which of the following phase changes is an exothermic change?

You are about to open a container that says "shake well before using." The substance is most likely a

In which step of the scientific method is information obtained through the senses?

A gas has

Which of the following is NOT part of Dalton's atomic theory?

A substance that is made of ONE type of atom is a(n)

What does the electron cloud model describe?

Which of the following is a heterogeneous mixture?

Matter with a definite volume but variable shape is

Which of the following will cause a decrease in gas pressure?

The phase change that is the reverse of condensation is

The law that states volume of a gas is directly proportional to its temperature in K is

Which of the following is NOT a pure substance?

In Bohr's model of the atom, electrons move

Which statement about subatomic particles is true?

JJ Thomson's experiements provided evidence that an atom

In an atomic model with a nucleus, positive charge is

Which of the following is a mixture?

What are the building blocks of all matter?

If a material contains 3 elements joined in a fixed proportion, it is a(n)

Which of the following does not affect the rate at which a solute dissolves?

What method can be used to separate mixtures when the entire mixture can pass through a filter

Which of the following is a characteristic of a mixture

Which of the following statements about ice melting is true

Which statement is true about oxygen-17 and oxygen-18

Rutherford's gold foil experiment provided evidence that

Which of the following are pure substances?

The number of protons in one atom of an element is that element's

Which of the following is a physical change?

During a phase change, the temperature of the substance

Which of the following is a chemical change?

Which subatomic particle has a negative charge?

What is the result of force distributed over an area?

A mixture can be classified as a suspension, solution or colloid based on the

Which of the following has the highest viscosity?

How is 0.057 written in scientific notation?

Which type of graph shows change over time?

If you move a substance from one container to another and the volume changes, it is a