Science Unit 2: Chemical Reactions

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

• Yields
• Reactants
• Products
• Precipitates

Tags

NGSS.MS-PS1-5

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

• Products
• Coefficients
• Precipitates
• Reactants

Identify the reactant(s) and product(s) of the reaction.

• All three are reactants and none are products.
• Hydrogen and water are the reactants, and oxygen is the product.
• Water and oxygen are the reactants, and hydrogen is the product.
• Hydrogen and oxygen are the reactants, and water is the product.
  

A molecule is smaller than an atom.

• True
• False

Tags

NGSS.MS-PS1-1

Identify the Reactants in this equation.

• A

• B

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Fill in the blank:
The law of conservation of mass states that matter cannot be created nor __________________.

• destroyed
• rearranged
• transferred
• changed

Tags

NGSS.MS-PS1-5

In a closed system, a chemical reaction takes place.  The mass of the reactants in the beginning of the reaction is 25g.  What does the mass have to be in the end of the reaction in order to follow the law of conservation of mass?

• 25g
• You can't tell with the given information.
• 30g
• 15g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

How many Sodium (Na) are in 6NaCl?

• 1
• 12
• 6

Tags

NGSS.MS-PS1-1

How many Aluminum are in Al₂O₃?

• 3
• 2
• 5

Tags

NGSS.MS-PS1-1

How many Hydrogen are in 4H₂O?

• 6
• 8
• 2
• 4

Tags

NGSS.MS-PS1-1