Chemistry Unit Test

Is this equation balanced?

• yes
• no

What kind of reaction is illustrated below?

• chemical
• physical

What kind of change is illustrated below?

• chemical
• physical

Which is correct about this chemical equation?

• Na 1 Br 1 Cl 2 - Na 1 Br 1 Cl 1
• Na 1 Br 1 Cl 2 - Na 1 Br 1 Cl 2
• Na 2 Br 1 Cl 2 - Na 1 Br 1 Cl 1
• Na 1 Br 1 Cl 2 - Na 1 Br 2 Cl 1

How does this support the law of conservation?

How many valence electrons are in this atom of Silicon?

• 14
• 8
• 4
• 2

Is this a balanced chemical equation?

• Yes
• No

Does this equation support the law of conservation of matter?

• Yes
• No

A balance is used to measure mass of an object.

• True
• False

The following equation represents photosynthesis. There are 18 atoms of oxygen on the reactant side. How many atoms of oxygen are on the product side of the equation?

• 6
• 12
• 14
• 18