Chem Review - periodic table - counting

How many atoms of chlorine are in Sn(ClO₃)₂?

• 1
• 2
• 3
• 6

How many total atoms are in Sn(ClO₃)₂?

• 1
• 3
• 6
• 9

Tags

NGSS.MS-PS1-1

Which type of evidence of a chemical reaction is best shown in the picture?

• Production of precipitate
• Production of gas
• Color change of a liquid
• Temperature change

Which type of evidence of a chemical reaction is best shown in the picture?

• Production of precipitate
• Production of gas
• Color change of a liquid
• Temperature change

Which would best be evidence a chemical reaction happened?

• The chemical you put in the refrigerator got colder 
• The two liquids you combined formed a solid
• The water you put in the freezer formed a solid
• The water you added green food coloring to turned green.

Tags

NGSS.MS-PS1-2

Which one of these is a physical change?

• Ice melting
• Precipitate forming
• Burning a match
• Unexpected change in temperature

What is the coefficient in the following: 3Cl₂

• 3
• 2
• 6
• 1

Burning paper is a -

• physical change
• chemical change

When salt dissolves in water, you have seen a -

• physical change
• chemical change

CO₂ is a(n) - 

• element
• compound