Chemistry Review

In this chemical equation, the elements in red are the_______.

• Products

• Reactants

• Subscripts

• Coefficients

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is NOT a sign of a chemical reaction?

• Bubbling
• Formation of Precipitate
• Adding Water
• Smoking

Tags

NGSS.MS-PS1-2

What are the reactants in an equation?

• What goes into a reaction
• What comes out of a reaction

How many molecules are in this formula?

• 1

• 2

• 3

• 6

Tags

NGSS.MS-PS1-1

What information does a subscript number tell us?

• the number of atoms per element

• the number of molecules per formula

Tags

NGSS.MS-PS1-1

What is the atomic mass for this element?

• 6

• 12.0107

• 6.0107

• 18.0107

Tags

NGSS.MS-PS1-1

Which of the following is a chemical change?

• Ice cream melting
• Water boiling
• A cake baking
• White liquid and red liquid combining to make pink liquid

Does this image prove the Law of Conservation of Mass?

• Yes
• No

What is the law of conservation of matter?

• Matter changes when reacted or changed.
• The mass of all reactants are changed during a physical or chemical change.
• The mass of the reactants is the same as the mass of the products.
• The mass of the products is different than the mass of the reactants.

Tags

NGSS.MS-PS1-5

Which of the following is evidence of a chemical change?  

• Change in state
• No new substance is formed
• Bubbles forming
• Change in shape

Tags

NGSS.MS-PS1-2