EOU 1 REVIEW

Two solutions are mixed and react to produce AgCl. The chemical reaction is shown by the balanced equation.

AgNO3 + LiCl → AgCl + LiNO3

 What happens to the total mass as the reaction takes place?

• The mass first increases and then decreases.

• The mass remains constant.

• The mass decreases.

• The mass increases.

What atoms are involved in this chemical reaction?

CaCO3 → CaO + CO2

• calcium, cobalt, and oxygen

• calcium, carbon, and oxygen

• carbon and oxygen

• calcium, carbon, and cobalt

Which labels correctly classify elements, compounds, homogeneous mixtures, and heterogeneous mixtures?

• 1. element, heterogenous mixture, homogenous mixture, compound

• 1. heterogenous mixture, element, homogenous mixture, compound

• 1. element, homogenous mixture, compound, heterogenous mixture

• 1. homogenous mixture, compound, heterogenous mixture, element

Capillary action happens because of what property of water?

• adhesion

• cohesion

• property

• surface tension

Which process is depicted in the image of an insect on water, such as the insect on water?

• capillary action

• adhesion

• surface tension

• cohesion

As the seasons begin to change, a leaf falls from a tree and lands on the surface of a pond. Instead of sinking, the leaf floats. What has happened to stop the leaf from sinking?

• The connection between the water molecules and the leaf molecules prevents the leaf from sinking.

• The connection between the water molecules on the surface of the water is very strong and prevents the leaf from sinking.

• The connection between the air molecules and the leaf molecules is very strong and prevents the leaf from sinking.

• The gravitational force on the leaf is very small, so there is not enough weight to allow the leaf to sink into the water.

What color does a base turn litmus paper?

• blue

• red

• yellow

• purple

What type of solution is one that has a pH of 9?

• acid

• base

• neutral

• acidic and basic

What is formed when an acid and a base are combined?

• sugar

• baking soda

• acidic solution

• salt

Using the periodic table, what atoms are present in the following chemical reaction?

CO2 + NaOH → NaHCO3

• nitrogen, hydrogen, oxygen, carbon

• sodium, oxygen, hydrogen, cobalt

• nitrogen, hydrogen, oxygen, cobalt

• sodium, oxygen, hydrogen, carbon