For the reaction: C4H10 + O2 �¨ CO2 + H2O ( is this balanced?) , how many moles of CO2 is formed when 5.00 moles C4H10 reacts with O2?
A. 5.00
B. 1.25
C. 20.0
It is not balanced. Here is an example. Just follow the steps.
http://www.jiskha.com/science/chemistry/stoichiometry.html
To determine the number of moles of CO2 formed when 5.00 moles of C4H10 reacts with O2, we first need to balance the chemical equation:
C4H10 + O2 → CO2 + H2O
Looking at the equation, we have 4 carbons on the left and 1 carbon on the right. We also have 10 hydrogens on the left and only 2 hydrogens on the right. Thus, we need to balance the equation by multiplying the coefficients.
C4H10 + 13/2 O2 → 4 CO2 + 5 H2O
Now that the equation is balanced, we can see that for every 1 mole of C4H10, we produce 4 moles of CO2.
Therefore, if we have 5.00 moles of C4H10, we will produce:
5.00 moles C4H10 x (4 moles CO2 / 1 mole C4H10) = 20.0 moles CO2
So the correct answer is C. 20.0 moles.
To determine if the given chemical equation is balanced, we need to count the number of atoms on both sides of the equation.
Starting with the reactants, C4H10 (butane) contains 4 carbon (C) atoms and 10 hydrogen (H) atoms. O2 (oxygen gas) contains 2 oxygen (O) atoms.
Moving to the products, CO2 (carbon dioxide) contains 1 carbon (C) atom and 2 oxygen (O) atoms. H2O (water) contains 2 hydrogen (H) atoms and 1 oxygen (O) atom.
Comparing the number of atoms, we can see that there are 4 carbon (C) atoms and 10 hydrogen (H) atoms on both sides. However, there are 2 oxygen (O) atoms on the reactant side and 4 oxygen (O) atoms on the product side. Therefore, the equation is not balanced.
To balance the equation, we need to adjust the coefficients in front of the molecules. The balanced equation for the reaction is:
C4H10 + 13/2 O2 → 4 CO2 + 5 H2O
Now that we have the balanced equation, we can determine the mole ratio of C4H10 to CO2. From the equation, we can see that for every 1 mole of C4H10, 4 moles of CO2 are formed.
Given that we have 5.00 moles of C4H10, we can multiply it by the mole ratio (4 moles CO2 / 1 mole C4H10) to find the number of moles of CO2 formed.
5.00 moles C4H10 * (4 moles CO2 / 1 mole C4H10) = 20.0 moles CO2
Therefore, the correct answer is C. 20.0 moles.