Review Exercises
1. Write each of the following in proper scientific notation:
a) 0.0623 ______
b) 48 x 10-2 ______
c) 123.456 x 10-3 ______
d) 0.0010006 ______
e) 0.00369 x 104 ______
2. For the following calculations, express the answer to the correct number of significant figures.
a) 1.60 x 10-3 + 9.0 x 10-3 = ______
b) 3.89 (2.8 x 102)/ 400 = ______
c) 1.0 x 101 + 1.0 x 102 = ______
d) (0.020) (0.002) (0.200) = ______
3. How many significant figures are in the following numbers?
a) 300.00 ______
b) 0.0060 ______
c) 0.2030 ______
d) 0.001 ______
e) 3800 ______
f) 06001.000 ______
4. Supply the correct number for each of the following. Show all work.
a) 16.7 μL = ______mL
b) 10.2 km = ______cm
c) 100 mL = ______mm3
d) 0.005 kg = ______mg
e) 0.020 M = ______mM (M = molarity)
f) 246.9 J = ______kJ
5. Give the formulas of the following compounds.
a) magnesium nitrite ______
b) silver oxide ______
c) zinc nitride ______
d) iron (II) carbonate ______
e) ammonium acetate ______
f) phosphoric acid ______
g) sulfurous acid ______
h) hydrocyanic acid ______
i) acetic acid ______
j) carbon tetrachloride ______
k) dinitrogen tetroxide ______
l) ammonium hydroxide ______
m) nitrogen dioxide ______
6. Complete the following table:
g / kg / mg / μg / ng1.3 x 10-4 g
12.6 ng
1.55 x 105 μg
1.99 x10-3 kg
8.66 x 10-5 mg
7. Acetone (fingernail-polish remover) has density of 0.7857g/cm3.
a) What is the mass in grams of 28.56 mL of acetone?
b) What is the volume in milliliters of 6.54 g of acetone.
8. A titanium bicycle frame contains the same amount of titanium as a titanium cube measuring 6.8 cm on a side. Use the density of titanium (d = 4510 kg/m3) to calculate the mass in kilograms of titanium in the frame. What would be the mass of a similar frame composed of iron (d = 7850 kg/m3)?
9. When ice melts, it absorbs 0.33 kJ per gram. How much ice (in grams) is required to cool a 12.0 oz drink from 75 ºF to 35 ºF if the heat capacity of the drink is 4.18 J/g ºC? (Assume 100 % efficiency in heat transfer.)