Glucose, C6H12O6, is a good source of food energy. When it reacts with hydrogen, carbon dioxide, and water are formed. How many liters of Co2 are produced when ___ grams of glucose completely react with oxygen?
Here is a worked example of a simple stoichiometry problem (which this is).
http://www.jiskha.com/science/chemistry/stoichiometry.html
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To determine the number of liters of CO2 produced when a certain amount of glucose reacts with oxygen, we need to follow a step-by-step approach. Here is how you can calculate it:
1. Determine the molar mass of glucose (C6H12O6):
Look up the atomic masses of each element in the periodic table. Carbon (C) has a molar mass of 12.01 g/mol, hydrogen (H) has a molar mass of 1.01 g/mol, and oxygen (O) has a molar mass of 16.00 g/mol. Multiply the number of each element by its molar mass and sum them up to find the molar mass of glucose.
Molar mass of glucose (C6H12O6):
(6 * 12.01 g/mol) + (12 * 1.01 g/mol) + (6 * 16.00 g/mol)
2. Determine the balanced chemical equation:
The reaction of glucose with oxygen produces carbon dioxide and water. The balanced equation is:
C6H12O6 + 6O2 -> 6CO2 + 6H2O
From this equation, we can see that for every 1 mole of glucose that reacts, 6 moles of CO2 are produced.
3. Convert grams of glucose to moles:
Using the molar mass of glucose calculated earlier, convert the given mass of glucose to moles. Divide the mass of glucose by its molar mass.
Moles of glucose = given mass of glucose / molar mass of glucose
4. Determine the moles of CO2 produced:
Since the reaction shows a 1:6 ratio between glucose and CO2, multiply the moles of glucose by 6 to find the moles of CO2.
Moles of CO2 = moles of glucose * 6
5. Convert moles of CO2 to liters of CO2:
At standard temperature and pressure (STP), 1 mole of any ideal gas occupies 22.4 liters. Divide the moles of CO2 by 22.4 to find the volume in liters.
Liters of CO2 = moles of CO2 / 22.4
By following these steps, you will be able to calculate the number of liters of CO2 produced when a given amount of glucose reacts with oxygen. Just substitute the given mass of glucose into the equation and perform the calculations.