1. Practice Final Exam

2. Metric Conversions 500 g x ________ mg (1000 mg = 1 g) g

3. Metric Conversions 400 cm x ________ m (1 m = 100 cm) cm

4. Density Calculations (Density = mass/volume)
What is the density of a 60 gram piece of metal with a volume of 1500 cm3?
Density = 60 gram = 0.04 g/cm3
1500 cm3

5. Density Calculations (Density = mass/volume)
Find the density of a cube with a length of 2 cm and a mass of 120 grams.
(volume = length x width x height)
Volume = 2 cm x 2 cm x 2 cm = 8 cm3
Density = 120 grams = 15 g/cm3
343 cm3

6. Grams -> moles How many moles are there in 200 grams H3PO4?
200 g H3PO4 x 1 mol H3PO4 = 2.0 mol H3PO4
98 g H3PO4
Molar mass H3PO4 = 1(3) (4) = 98 grams

7. Moles -> grams How many grams are there in 80 moles H2SO4?
80 mol H2SO4 x 98 g H2SO4 = 7840 g H2SO4
1 mol H2SO4
Molar mass H2SO4 = 1(2) (4) = 98 grams

8. Electron Configuration
N 7 = 1s22s22p3

9. Electron Configuration
S 32
S 32 = 1s22s22p63s23p64s23d104p2