AP Chem 1

How many sig figs are in 0.0100

• 2

• 3

• 4

• 1

Mark all physical changes

• pulverizing an aspirin tablet

• the metal oxidizes, becoming dull and brittle

• melting wax

• corrosion of aluminum metal by hydrochloric acid

Brass

• homogeneous

• heterogeneous

The phase change from water vapor to liquid water is known as...

• evaporation
• precipitation
• condensation
• sublimation

Molecules are closest together in a 

• Solid
• Liquid
• Gas

Change from standard form to scientific notation: 12,000,000

• 12.0  x  10⁷
• 0.12  x  10⁷
• 1.2  x  10⁶
• 1.2  x  10⁷

Change from standard form to scientific notation:  450,000

• 4.5  x  10⁵
• 45  x  10⁵
• 4.5  x  10⁴
• 4.5  x  10⁶

How many significant figures does the following number have: 0.002040

• 6
• 4
• 3
• 2

How many significant figures does the following number have: 100.00210

• 7
• 5
• 10
• 8

How many significant figures does the following number have: 56.040

• 2
• 3
• 4
• 5