Chemistry

Sig Figs

100

How many Sig Figs in 107800 m?

4 Sig Figs

300

How many Sig Figs in 5.70 x10^-5 m?

3 Sig Figs

400

How many Sig Figs in 19000. m?

5 Sig Figs

500

How many Sig Figs in 0.007301 m?

4 Sig Figs

Conversion Factor

100

A sample of copper wire has a mass of 2500 milligrams. What is the mass of the wire in grams?

2.5 g

300

A piece of magnesium ribbon is 0.075 meters long. What is the length in micrometers (µm)?

75,000 µm

400

A lab experiment runs for 1.25 hours. How many seconds is that?                                                 (Hint: hours -> mins -> sec)

4500 seconds

500

A string is 4.2 kilometers long. Convert this length into centimeters.
(Hint: km → m → cm)

420,000 cm

Formula & Name of Ionic Compounds

100

Aluminum (Al) & Chlorine (Cl)

AlCl₃ Aluminum Chloride

300

Sodium (Na) & Chlorine (Cl)

NaCl Sodium Chloride

400

Lead (ll) (Pb) & Sulfer (S)

PbS Lead (ll) Sulfide

500

Na⁺ & PO₄^3-

Na₃PO₄  Sodium Phosphate