Chem Worksheet

Stoichiometry Calculation Practice Worksheet


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Calculate the number of moles of NaOH that are needed to react with 500.0 g of


according to the following equation:

H2SO4 (aq)+ 2NaOH ® Na2SO4 + 2H2O


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


What mass of CO2 can be produced from the reaction of 2


0 g of C3H8

with 75.0 g of O2 according to the following equation:

C3H8 + 5O2 ® 3CO2 + 4H2O


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


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!]

  • After a nice meal, perhaps you’d finish it off with a pound (1.00 lb) cake for dessert. What would the name of this cake be in grams?
  • In the US milk is sold by the gallon, while in Denmark it is sold by the liter. How many liters of milk would you need to equal one gallon?
  • If you go to school for 180 days each school year and each school day is 7 hours long, how many hours are spent in school in one school year?
  • Metric Measurement Conversion Instructions: Use the prefix conversion chart on page 2 of your reference packet to complete the following metric equalities. kg = g , cm = m, mm = m, ms = s , km = m cL = L , mg = g, kL = L , mg = g , mL = L , Mg = g
  • Use the prefix conversions chart and dimensional analysis (don’t simply “move the decimal point”) to convert the measurements below as indicated. You can use scientific notation for very large or small numbers.
  • 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:



    Convert 14.78 ft to miles

  • Calculate: 33g *14.22grams=
  • Add: 12g+ 13.25mg +14.2lbs= answer in grams


    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, and your weight is 210.15lbs: how much drug ( in lbs) do you need?
  • 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?

  • If your car gets 19.09 mpg (miles/ gal), and you drive 100kph (kilometers/ hr) for 2165 km and gas cost $ 5.75/L- how much in dollars di9d it cost to drive?
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