CHEM101

This separation method is used to separate components of a mixture with a dissolved solid in a liquid.

• Evaporation

• Filtration

• Decantation

• Distillation

What determines the atomic mass number of a specific element?

• Number of protons in its nucleus

• Number of neutrons plus protons in its nucleus

• Number of electrons in its outermost shell

• Number of neutrons plus electrons in its nucleus

What is the color of the light that sodium compounds give off?

• blue

• green

• yellow

• red

Which type of reaction involves one element and one compound reacting?

• Combustion

• Decomposition

• Single Replacement

• Double Replacement

What is the probable product of a double replacement reaction?

• A new compound and the replaced metal

• A new compound and the replaced metal

• Two different compounds

• A single compound

If the pressure of a gas is increased, and its volume remains constant, what will happen to its temperature?

• increase

• decrease

• constant

• x2

1.     What is a limiting reactant?

• The reactant that is in excess

• The product that you can make the most of

• The amount of reactants that react with each other

• The reactant that determines how much product can be made

When the equation, Fe + Cl₂ --> FeCl₃, is balanced, what is the coefficient for FeCl₃?

• 1

• 2

• 3

• 4

When the equation, Fe + Cl₂ --> FeCl₃, is balanced, what is the coefficient for Fe?

• 1

• 2

• 3

• 4

In the oxidation of ethane:

2 C₂H₆ + 7 O₂ → 4 CO₂ + 6 H₂O

 

How many moles of O₂ are required to react with 1 mole of ethane?

(follow this format for answer: amount (space) unit