1. Metrics, Moles, & Sig Figs – oh my!

2. Complete the following metric facts
1 m = ______ cm
1 m = 100 cm
_______ g = 1 kg
1000 g = 1 kg
1 hL = _____ L
1 hL = 100 L
_________ µm = 1 m
1,000,000 µm = 1 m

3. How many sig figs are in the following measurements?
672 mL 3
10 g 1
130.0 km 4
0.004 m 1
42.8 L 3
3030 g hL 5

4. How many centimeters are there in 1.23 x 10-6 kilometers?

5. How many inches are there in 355 millimeters? (Fact: 1 inch= 2.54 cm)

6. Moles! List the three conversion factors you know about moles: 1 mol =
6.02 x 1023 particles (atoms, molecules, oranges)
22.4 L of gas (at Standard Temperature and Pressure)
Mass in grams from the periodic table

7. When there are 0.0314 moles of candy canes how many candy canes are there?

8. If there are 9.6x1015 particles of sugar in a solution then how many moles of sugar are there?

9. A balloon contains 6. 7 L of helium gas at STP
A balloon contains 6.7 L of helium gas at STP. How many moles of gas is that?
= mol = 0.30 mol
6.7 L
1 mol
22.4 L

10. A sample of silicon has a mass of 33. 1 g
A sample of silicon has a mass of 33.1 g. How many moles of silicon is that?
= mol = 1.18 mol Si
33.1 g Si
1 mol Si
28.1 g Si

11. What is the mass of 0.25 mol of Phosphorous?
= g P = 7.7 g P
0.25 mol P
30.97 g P
1 mol P

12. Perform each calculation and round to correct number of significant figures