CHEMICAL REACTION

Multiple Choice

MgCl₂ represents a chemical

• Element

• Chemical Formula

• Subscript

• Coefficient

Multiple Choice

The substances listed on the right side of a chemical equation are the

• Coefficients

• Reactants

• Products

• Precipitates

Multiple Choice

The substances listed on the left side of a chemical equation are the

• Products
• Coefficients
• Precipitates
• Reactants

Multiple Choice

In chemical reactions, what does the principle of conservation of mass mean?

• Matter is not created or destroyed.
• The total mass of the reactants is greater than the total mass of the products.
• The total mass of the reactants is less than the total mass of the products.
• Matter is not changed.
  

Multiple Choice

How many different kinds of elements are in C₆H₁₂O₆?

• 1

• 2

• 3

• 4

Multiple Choice

How many atoms of Carbon are in the following formula?

3C₂H₆

• 3

• 6

• 9

• 18

Multiple Choice

How many atoms of Hydrogen are in the following formula?

3C₂H₆

• 3

• 6

• 9

• 18

Multiple Choice

Which is the Law of Conservation of Matter?

• matter cannot be created or destroyed, it only changes form
• matter can be created but it cannot be destroyed, it never changes form
• matter can be destroyed but it cannot be created, it usually just changes form
• matter is an unproven theory created by Hans Geiger

Multiple Choice

What are the coefficients that will balance the skeleton equation below?

__Na + __F₂ → __NaF

• 1, 2, 1

• 2, 1, 2

• 1,1,1

• 2,2,2

Multiple Choice

The small numbers in a chemical formula:

(the BLUE numbers)

• Subscripts

• Coefficients

• Numbers

• Molecules

Chemical Equations

​4Li + O2 ---> 2LiO2

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The plus sign separates the reactants

​The subscript (small numbers) tells you how many atoms of the element are in the compound!​

The arrow is the Yield Sign for the equation.

The Coefficient (big numbers) tells you how much of the compound you have​.

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What is a Chemical Equation?

A chemical equation represents the bonds breaking apart in a chemical reaction. It shows the shuffling of atoms from one compound to another!

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​They also show the conservation of matter, showing the number of atoms before the reaction is equal to the number of atoms afterwards!