Chemical Reactions

A chemical change is different than a physical change because in a chemical change

• chemicals are used

• molecules do not physically touch

• a new substance is formed and in a physical no new substance is formed

• the change can be seen but in a physical change it cannot

Tags

NGSS.MS-PS1-2

How many Carbons are present on the reactant side?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

How many Hydrogens are on the product side of this chemical equation?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

How many Oxygens are on the product side of this chemical equation?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Is this chemical equation balanced? Why or why not? Choose the BEST answer.

• Yes, the amount of atoms for each element are equal on both the reactant and product side.

• No, the carbons are not the same number on both the reactant and product side.

• No, neither the carbons or hydrogens are the same amount on both the reactant and product side.

• No, none of the elements (carbon, hydrogen, or oxygen) are the same amount on both the reactant and product side.

Tags

NGSS.MS-PS1-5

In the reaction methane + oxygen turns into carbon dioxide + water, the methane and oxygen are called _______________.

• reactants
• products
• neutrals
• energizers

A change in the shape of an object is an example of _________________.

• a chemical change
• energy
• an endothermic change
• a physical change

the starting materials in a chemical reaction

• Products

• Reactants

• Starters

• Energizers

The new substances that are made after a chemical equation are the

• Products

• Reactants

• Starters

• Enders

Tags

NGSS.MS-PS1-5

The blue numbers in the image below represent ________

• subscripts

• coefficients

Tags

NGSS.MS-PS1-1