Open Question
When table sugar (sucrose, C12H22O11) is heated, it decomposes to form C and H2O.How many grams of carbon are formed by the breakdown of 60.0 g of sucrose?
8. Quantities in Chemical Reactions
Stoichiometry
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The reaction of potassium chlorate and sucrose is given below:
If 2.33 x 10-7 formula units of potassium chlorate are reacted, how many grams of carbon dioxide will be produced?
A
3.94x10-16 g CO2
B
8.23x10-23 g CO2
C
2.72x10-21 g CO2
D
7.81x10-23 g CO2
E
2.55x10-29 g CO2
Verified step by step guidance1
Identify the balanced chemical equation: 8 KClO3 + C12H22O11 -> 8 KCl + 12 CO2 + 11 H2O.
Determine the molar ratio between KClO3 and CO2 from the balanced equation, which is 8:12 or 2:3.
Calculate the number of moles of KClO3 using Avogadro's number (6.022 x 10^23 formula units/mol): moles of KClO3 = 2.33 x 10^-7 formula units / 6.022 x 10^23 formula units/mol.
Use the molar ratio to find the moles of CO2 produced: moles of CO2 = (moles of KClO3) x (3 moles CO2 / 2 moles KClO3).
Convert the moles of CO2 to grams using the molar mass of CO2 (44.01 g/mol): grams of CO2 = moles of CO2 x 44.01 g/mol.
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