East Chemistry Unit 2 Review

Select all the mixtures from the list below...

• C₆H₁₂O₆

• O₂

• H₂O & NaCl

• Cu & Zn

• Au

Select all the elements from the list below...

• CO

• Co

• NO₂

• N₂

• N₂ & O₂ & CO₂

Select all the compounds from the list below...

• ZnSO₄

• Si

• SO

• N₂ & O₂

• C₆H₁₂O₆

This model represents the particles of...

• an element

• a compound

• a mixture

• there's not enough information to tell

Which model shows a molecule that is also an element?

• 
• 
• 
• 

How many sulfur atoms are in a molecule of zinc sulfate (ZnSO₄)?

• 0

• 1

• 4

• You can't tell from the formula.

How would you record this measurement to the correct number of significant figures?

• 6.0 mL

• 6.6 mL

• 6.60 mL

• 6.600 mL

How would you record this measurement to the correct number of significant figures?

• 3.0 cm

• 3.2 cm

• 3.25 cm

• 3.250 cm

In which state are molecules of water going to have the most kinetic energy?

• solid

• liquid

• gas

• the kinetic energy will be the same for all states of matter

What's the best description of the motion of atoms in a solid sample of cobalt at room temperature?

• The atoms don't move

• The atoms vibrate in place

• the atoms move around each other in a definite volume.

• the atoms move independently of one another and have no definite volume.