Chem Worksheet
Stoichiometry Calculation Practice Worksheet
1.
Calculate the number of moles of NaOH that are needed to react with 500.0 g of
H2SO4
according to the following equation:
H2SO4 (aq)+ 2NaOH ® Na2SO4 + 2H2O
2.
Calculate the mass of NH3 that can be produced from the reaction of 125 g of NCl3 according to the following equation:
NCl3 + 3H2O ® NH3 + 3HOCl
3.
What mass of CO2 can be produced from the reaction of 2
5.
0 g of C3H8
with 75.0 g of O2 according to the following equation:
C3H8 + 5O2 ® 3CO2 + 4H2O
4.
How many grams of SO2 are produced when 152 g of CS2 react with 48.0 g of O2
according to the following equation:
CS2 + 3O2 ®CO2 + 2SO2
5.
When 50.0 g of MgCO3 react completely with H3PO4, as shown below,
15.8 g of CO2 are produced.
What is the percent yield for this reaction?
2 H3PO4 + 3MgCO3 ® Mg3(PO4)2 + 3 CO2 + 3H2O
Use dimensional analysis (the “factor-label” method) to solve the following problems. Show all steps needed to convert from starting units to ending units. Indicate all relationships needed before setting up and solving the problem. Use any of the following relationships if needed: 1 mile = 1760 yds, 16 oz = 1 lb 1 L = 1.057 qts ,1 day = 24 hours ,1 yd = 3 ft, 2000 lbs = 1 ton, 4 qts = 1 gal, 1 hour = 60 mins, 1 ft = 12 in 1 oz = 28.35 g, 32 oz = 1 qt 1, min = 60 secs ,1 mile = 1.6093 km, 1 kg = 2.205 lbs, 1 qt = 2 pts
A runner competed in a 5-mile run. How many yards did she run?
In the Tour de France, cyclists ride 3,653.6 km in 20 days. How many miles do they go? [Hint: watch for unimportant information!]
1) 40 mL to L
2) 5400 L to kL
3) 85 g to kg
4) 52 mg to g
5) 6300 m to km
6) 2.50 kg to g
7) 18,600 g to kg
8) 544 mL to L
9) 1.92 L to mL
10) 425 cm to m
11) 7870 mL to L
12) 6.42 m to mm
13) 1850 cm to m
14) 11.4 km to m
15) 3 m to mm
16) 25 Mg to g
17) 74 cm to mm*
18) 835 mg to kg* *
two-step conversions
Give the answer to the correct digits and units:
(1.2336-2.3666)X(14.23*15.6)
(56.998+14.002)
Convert 14.78 ft to miles
Add: 12g+ 13.25mg +14.2lbs= answer in grams
56g+16.6669g+14.3339g=
The speed of light is 2.999 X 10^8 meters/ sec, calculate how many milisec it takes to travel 1569.33miles.
If you need a drug dose at 1.36mg/kg body mass (drug density is 1.15g/mL), and your weight is 210.15lbs: how much drug ( in mL) do you need?