Pedro wants to create a chemical reaction between oil and water. he adds oil to a beaker of water and notices that the liquids do not mix. he then shakes the beaker and the drops of oil become suspended through the water for a few moments before returning to their separate layers. did pedro succeed in creating a chemical change?
(a)-yes, because the oil was evenly suspended.
(b-)yes, because the solution was permanently changed.
(c)-no, because the oil only briefly mixed with the water. (
d)no, because no new substances were formed.

D

Explanation:

A chemical change occurs when new substances are formed for exemple

HCO3 --> H2O + CO2

This is a decomposition of the carbonic acid.

A) No, the oil been evenly suspended is a phisycal phenomenon

B) No, the solution changed when the beaker was shaked but returned to the initial state.

C) The oil will not react with water because of their polarity, the water is Polar and the oil is nonpolar

D) This one is correct, as there where no new substances formed, it no have a chemical change.

spectral lines lyman is one set

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.