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WorksheetsIntro to Stoichiometry
Total questions: 15
Worksheet time: 54mins
What is the first thing you must do to solve a stoichiometry problem?
Write a Balanced Equation
Calculate the number of moles
Calculate the molar mass
Determine the mole ratios
Balance the following reaction :
CaCl₂(s) + H₂O(l) --> HCl(g) + Ca(OH)₂(aq)
1,2,2,1
1,2,1,1
2,1,1,1
2,1,2,1
How do you go from grams to moles?
divide by molar mass
multiply by molar mass
divide by avogadro's number
multiply by avogadro's number
How many moles are in 45.6 g Ca?
0.879mol Ca
1.14mol Ca
1.50mol Ca
0.62 mol Ca
How many grams are in 10.2 moles of NaCl?
597grams
5.74 grams
579 grams
7.65 grams
Na2SIO3(s) + 8HF(aq) --> H2SiF6 (aq) + 2NaF(aq) + 3H2O(l)
If 9 moles of water are produced at the end of the reaction, how many moles of hydrofluoric acid were used?
Write a balanced chemical equation for this reaction.
If 0.678 moles of sodium hydroxide are produced how many moles of sodium oxide was consumed in the reaction?
Fe2O3(s) + CO(g) --> Fe(m) + CO2(g)
If 32 moles of iron metal was produced during the reaction, how many moles of carbon monoxide were consumed?
What coefficients are needed to balance the reaction?
2H2 + O2 --> 2H2O
If I have 64 grams of oxygen, about how many grams of water could I make? (Hint, you have to convert any given info to moles. Then use that to get moles of the other thing, then convert to grams )
8g
4g
72g
Cannot be determined from the given info
How many grams of aluminum sulfate would be formed if 250g H2SO4 completely reacted with aluminum?
