Chemistry Essentials
Calculator Practice Worksheet
Name: ________________________________________________ Per.: ____ Date: ________
Use your calculator to perform the following calculations. Round your answers to 2 decimal
places, and report your answer in scientific notation.
1. (3 x 14.01) + (12 x 1.01) + (1 x 30.97) + (4 x 16.00) = ________________
2. 3.52 x 55.86 = _______________
3. 3589  192.22 = __________________
4. 25.27 x (1 x 10-3) = _________________________
5. 2.75  ( 1 x 10-3) = ___________________________
6. 5126 x (6.02 x 1023) = __________________________
7. (5.29 x 1035)  (6.02 x 1023) = __________________________
8. (2.35 x 10-8)  (6.02 x 1023) = ___________________________
9. (6.25 x 10-3) x (6.02 x 1023) = ______________________________
10. (2.53 x 10-8) + (8.67 x 10-3) – (6.35 x 104) = ___________________________
11. (25 x 3 x 21)  (15 x 2) = _________________________________
Chemistry Essentials
Measurement and Calculations
Conversions Worksheet
Name: _____________________________________________ Per.: _____ Date: ______
Make the following conversions. Show all your work (as demonstrated in class) on a
separate piece of paper and attach it to the back of this paper. Report all answers in
scientific notation. Round the coefficient to two decimal places
1. 3.4 liters to milliliters _____________________
2. 876 millimeters to meters __________________
3. 78,999 milligrams to grams ________________
4. 0.9 centigrams to grams ___________________
5. 112 meters to millimeters __________________
6. 45 meters to centimeters___________________
7. 11.7 grams to kilograms ___________________
8. 0.0009 kiloliters to liters ___________________
9. 44 centimeters to meters ___________________
10. 277 kilograms to grams ____________________
11. 16.7 inches to cm _____________________
12. 25 yards to meters __________________
13. 65 years to seconds __________________
14. 84 miles to kilometers __________________
15. 4.75 centimeters to inches _______________
16. 48,987 minutes to days __________________
17. 29.6 gallons to milliliters ___________________
18. 6552 milliliters to quarts ____________________
19. 4.56  1032 kilograms to milligrams ________________
20. 9.58 x 1012 kilometers to millimeters _________________
21. 5.2369 x 10-6 kilograms to micrograms _________________
22. 6.97896 x 108 milliliters to megaliters ____________________
23. 2.36951 x 1025 grams to kilograms ______________________
24. 1.233 x 10-6 liters to milliliters _________________________
25. 2.612 x 109 grams to milligrams_________________
Useful Information
1 inch = 2.54 cm
1 mile = 1.61 km
1 lb = 454 g
1 liter = 1.06 qt
1 gal = 3.78 liters
1 yard = 3.00 feet
Chemistry Essentials
Molar Mass Worksheet
Name: ______________________________________________Per._____ Date: _______
Calculate the molar mass(grams/mole) for each of the following compounds. SHOW ALL
YOUR WORK USING THE METHOD SHOWN IN CLASS.
1. KMnO4
2. CH4
3. P2O7
4. (NH4)2SO4
5. FeCl3
6. CuOH
7. Mg3(PO4)2
8. C6H12O6
9. Cr2(Cr2O7)3
10. Sn(C2H3O2)4
Chemistry Essentials
Mole Worksheet
Name: _____________________________________________ Per.: ____ Date: ________
Answer the following questions. SHOW ALL YOUR WORK USING THE METHOD
TAUGHT IN CLASS.
1. How many ducks are there in 5.25 moles of ducks?
2. How many grains of sand are there in 3.25 x 10-5 moles of grains of sand?
3. How many stuffed animals are in 6.50 x 10-24 moles of stuffed animals?
4. How many cookies are there in 1.93 x 103 moles of cookies?
5. How many bacteria are there in 1.49 moles of bacteria?
6. How many moles of koalas are in 1.50 x 105 koalas?
7. How many moles of viruses are in 1.0 x 1031 viruses?
8. How many moles of rocks are in 2.50 x 103 rocks? ( That is 2500 rocks)
9. How many moles of students are in 1950 students?
10. How many moles of people are on the earth, if the population of the earth is 7.01 x 109
people?
Chemistry Essentials
Measurement and Calculations
Rounding Decimals Worksheet
Name: _____________________________________________ Per.: _____ Date: ______
Round to the nearest tenth (1 decimal place):
1)
2)
3)
4)
5)
6)
0.457 __________
2.793 __________
0.124 __________
0.8156 _________
3.456 __________
0.317 __________
7)
8)
9)
10)
11)
12)
0.672 __________
4.321 __________
0.543 __________
0.93 __________
12.57 __________
0.781 __________
19)
20)
21)
22)
23)
24)
0.672 __________
4.321 __________
0.543 __________
0.93 __________
12.57 __________
0.781 __________
Round to the nearest hundredth (2 decimal places):
13)
14)
15)
16)
17)
18)
0.457 __________
2.793 __________
0.124 __________
0.8156 _________
3.456 __________
0.317 __________
Round to nearest whole number (no
decimal places):
25)
26)
27)
28)
29)
30)
31)
32)
1.4 __________
8.34 _________
2.8 __________
9.91 _________
3.458 __________
7.123 __________
4.67 __________
12345.2567 __________
Chemistry Essentials
Measurement and calculations
Scientific Notation Worksheet
Name: _____________________________________________ Per.: _____ Date: ______
Convert the following to scientific notation. Round the coefficient to two decimal places.
1)
45,700 _________________
2)
0.009 ___________________
3)
23 _____________________
4)
0.9 _____________________
5)
24,212,000 ______________
6)
0.000665 ________________
7)
21.9____________________
8)
0.00332 _________________
9)
321 ____________________
10)
0.119___________________
11)
1492 ___________________
12)
0.2713__________________
13)
314159__________________
14)
6022 ___________________
15)
0.12011_________________
Convert the following numbers in scientific notation to expanded (standard) form.
16)
3.825 x 103 ______________
17)
6.3 x 104 ________________
18)
2.3 x 10-2 _______________
19)
4.44 x 10-6 ______________
20)
7.121 x 109 ______________
21)
1.2 x 10-1 _______________
22)
1.8 x 102 ________________
23)
8.1 x 10-4 _______________
24)
6.7 x 105 ________________
25)
3.4 x 107 ________________
Chemistry Essentials
Stoichiometry Worksheet
Moles → Moles
Name: ___________________________________________________ Per.: _____ Date: ______
SHOW ALL YOUR WORK USING THE METHOD SHOWN IN CLASS.
1. The balanced chemical equation for the combustion of propane(C3H8) is
C3H8(g) + 5O2(g)→ 3CO2(g) + 4H2O(g).
a. How many moles of carbon dioxide will be formed from 2.5 moles of propane?
b. How many moles of carbon dioxide will be formed from 2.5 moles of oxygen gas
(O2)?
c. How many moles of water will be formed from 5.9 moles of oxygen gas?
d. How many moles of water will be formed from 5.9 moles of propane?
e. How many moles of propane are needed to react completely with 3.75 moles of
oxygen gas?
f. How many moles of oxygen gas are needed to react completely with 3.75 moles
of propane?
g. How many moles of propane are needed to produce 1.85 moles of carbon
dioxide?
h. How many moles of oxygen gas are needed to produce 1.85 moles of carbon
dioxide?
i. How many moles of oxygen gas are needed to produce 6.83 moles of water?
j. How many moles of propane are needed to produce 6.83 moles of water?
Chemistry Essentials
Stoichiometry Worksheet
Mass → Mass
Name: ___________________________________________________ Per.: _____ Date: ______
SHOW ALL YOUR WORK USING THE METHOD SHOWN IN CLASS. You only need to
show molar mass calculations once.
2. The balanced chemical equation for the combustion of propane(C3H8) is
C3H8(g) + 5O2(g)→ 3CO2(g) + 4H2O(g).
a. How many grams of carbon dioxide will be formed from 2.5 grams of propane?
b. How many grams of carbon dioxide will be formed from 2.5 grams of oxygen gas
(O2)?
c. How many grams of water will be formed from 5.9 grams of oxygen gas?
d. How many grams of water will be formed from 5.9 grams of propane?
e. How many grams of propane are needed to react completely with 3.75 grams of
oxygen gas?
f. How many grams of oxygen gas are needed to react completely with 3.75 grams
of propane?
g. How many grams of propane are needed to produce 1.85 grams of carbon
dioxide?
h. How many grams of oxygen gas are needed to produce 1.85 grams of carbon
dioxide?
i. How many grams of oxygen gas are needed to produce 6.83 grams of water?
j. How many grams of propane are needed to produce 6.83 grams of water?