Chemistry, 18.10.2019 00:00 payshencec21

Which statement best describes a physical change?

changes can occur to certain chemical properties of the substance, but the overall shape of the substance will remain the same.
changes can occur to certain physical properties of the substance, but the overall shape of the substance will remain the same.
changes can occur to physical properties of a substance, but the chemical composition of the substance remains the same.
changes can occur to chemical properties of a substance, but the chemical composition of the substance remains the same.

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Answer from: 1963038660

Changes can occur to physical properties of a substance, but the chemical composition of the substance remains the same.

Explanation:

Physical Change

The changes that occur only due to change in shape or physical properties but their chemical or internal composition remain unchanged.

These changes were reversible.

They have same chemical property.

These changes can be observed with naked eye.

Example :

Water converting to Ice

Water converting to gas

In this water molecule remain the same only they rearrange themselves that change its state of mater not composition

Chemical change:

The changes, that occur due to change in the composition of a substance and result in a different compound is known as chemical change.

These changes are irreversible

These changes occur due to chemical reactions

These may not be observed with naked eye

Example:

Combustion of fuel or wood: that oil or wood convert into energy, CO2 and ash in case of wood

Boiling of egg: that change the chemical composition of protein in the egg .

The reaction of Hydrogen and oxygen:

H 2 (g) + O 2 (g) > 2H 2O (l)

Answer from: nolimitsteve3210

the answer is d

Explanation:

Changes can occur to chemical properties of a substance, but the chemical composition of the substance remains the same.

Answer from: Quest

answer; i believe that the correct answer is (a) potassium(k)

Answer from: Quest

The grandmother cell is a hypothetical neuronthat represents a complex but specific concept or object.[1] it activates when a person "sees, hears, or otherwise sensibly discriminates"[2] a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the gnostic neuron, was proposed two years later

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Which statement best describes a physical change?

changes can occur to certain chemical...