Chemical Reactions

In____________ 2 substances react to form a single new product .

• synthesis reactions

• decomposition reactions

• single replacement reactions

• double replacement reactions

An element plus additional element reacts to form one product is an example of which type of chemical reaction? 

• combustion

• decomposition 

• synthesis 

• single replacement

A + B --> AB

• synthesis

• decomposition

• single replacment

• double replacement

How do we know that a chemical reaction happened?

• New substance was formed.

• Substances changed size.

• Substance turned from solid to liquid.

• Substance split into pieces.

Which is NOT an indication of a chemical change?

• Temperature Change

• Shape Change

• Formation of a precipitate

• Production of light

What is the left part of a chemical equation called?

2H_{2 +} O₂ --> 2H₂O

• Reactants

• Yields

• Products

• Chemical Equation

What is the right part of a chemical equation called...

2H_{2 +} O₂ --> 2H₂O

• Reactants

• Yields

• Products

• Chemical Equation

Which of the following shows the correct way to balance the chemical equation?
Fe + O₂ -> Fe₂O₃

• 4Fe + 3O₂ -> 2Fe₂O₃

• 2 Fe + 3O₂ -> Fe₂O₆

• 4 Fe + O₆ -> 2Fe₂O₃

• None of the options are correctly balanced.

MgCl₂ represents a chemical

• Element

• Chemical Formula

• Subscript

• Coefficient

How many different kinds of elements are in C₆H₁₂O₆?

• 1

• 2

• 3

• 4