Chemical Reactions

True or False
In a chemical reaction, no new atoms are created, and no atoms are destroyed. 

• true
• false

Tags

NGSS.MS-PS1-5

The left side of the equation below is called

• Products
• Reactants

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-1

The right side of the equation below is called the

• products
• reactants

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A chemical reaction that absorbs heat

• Single replacement
• Exothermic
• Endothermic

Tags

NGSS.MS-PS1-4

NGSS.MS-PS1-6

In a chemical reaction,

• the atoms of the reactants always stay together to form the products.

• the atoms of the reactants unbond, rearrange, and then rebond to form the products

• new atoms are formed which combine to make the products

Tags

NGSS.MS-PS1-5

How many Carbons are present on the reactant side?

• 1

• 2

• 3

Tags

NGSS.MS-PS1-1

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

• 2

• 3

• 4

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-1

The starting materials in a chemical reaction

• Products
• Reactants
• Starters

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

If reaction starts with 20g of reactants it should produce... 

• a total of 40g of product
• a total of 10g of product
• a total of 20g of product

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The Law of Conservation of Mass states

• that matter exists in all states and reacts the same.

• that matter exists in the same state throughout any chemical change.

• that matter cannot be created or destroyed and that the mass of the products must equal the mass of the reactants.

Tags

NGSS.MS-PS1-5