What are 2 ways that rate of dissolution can be increased?

• Place the beaker on a hot plate

• Increase the rate at which the solution is stirred

• Add an ice cube to the solution

• Decrease the rate at which the solution is stirred

A chemical formula is displayed below:
C₂H₃O₂NH₄

How many atoms, in total, are in this chemical formula?

Which 2 of the following represents a single atom?

• N

• O₂

• 2K

• NH₃

• Br

Tearing paper is a:

• Physical Change

• Chemical Change

Painting a fence is a:

• Physical Change

• Chemical Change

Chewing food is a:

• Physical Change

• Chemical Change

During digestion, your food turns into another substance. This is a:

• Physical Change

• Chemical Change

Toasted bread is a:

• Physical Change

• Chemical Change

Sugar dissolving in water is a:

• Physical Change

• Chemical Change

Popping fireworks is a:

• Physical Change

• Chemical Change