Quiz 4 Review

In a ___________change, a substance changes into a different substance.

• Physical

• Chemical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A chemical reaction or process that releases heat.

• Endothermic

• Exothermic

Tags

NGSS.HS-PS1-4

What are Chemical Reactions?

• 
  It's when you mix substances.

• 
  When something bubbles.

• 
  a process in which atoms rearrange to form new substances

• 
  letter and numbers showing the types and number of atoms

Tags

NGSS.MS-PS1-5

How many HYDROGEN atoms are in this compound? CH4​  

• 2

• 3

• 4

• 5

Tags

NGSS.MS-PS1-1

Which of the following models best demonstrates a balanced chemical equation?

• F

• H

• J

• G

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Is this balanced? 2HgO → 2Hg + O₂

• Yes

• No

Tags

NGSS.MS-PS1-5

In a chemical equation, is it true that -

• an element or compound must be accompanied by a phase change

• 
  the coefficients indicate the number of molecules of each reactant used and the number of molecules of each product made

• 
  the reactant side and product side can have different numbers of atoms for each element

• there can be different elements on the reactant side and the product side

Tags

NGSS.MS-PS1-5

A substance that is formed as the result of a chemical reaction is a __________________

• Reactant

• Product

Tags

NGSS.MS-PS1-2

The Law of Conservation of Mass states

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

• that matter exists in all states and reacts the same

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

• that matter can only be changed into new substances by introducing a catalyst

Tags

NGSS.MS-PS1-5

How many Al atoms are in this compound?   4Al₂O₃

• 2

• 8

• 4

• 6

Tags

NGSS.MS-PS1-1