Page 1 of 1

Net number of molecules

Posted: Tue Oct 02, 2018 3:19 pm
by Krista Mercado 1B
How do you calculate the net number of moles produced in a balanced chemical reaction?

Re: Net number of molecules

Posted: Tue Oct 02, 2018 3:34 pm
by Jeffrey Xiao 4A
Stoichiometric coefficients represent number of moles so in a balanced chemical equation, to find net moles, subtract total number of moles of molecules from reactant side from the total number of moles of molecules from product side

For example: From the Balancing Chemical Equations assessment module

4C4H10(g) + 26O2(g) → 16CO2(g) + 20H2O(g)

Total number moles from product side: 16+20=36
Total number moles from reactant side: 4+26=30

Net number of moles= Total number of moles from product side-total number of moles from reactant side=36-30=6

Re: Net number of molecules

Posted: Thu Oct 04, 2018 5:28 pm
by lindsey_ammann_4E
1. Add up the coefficients of each side of the equation (this gives you the total amount of moles on each side).
2. Find the difference in moles on each side (subtract the total moles of products from the total moles of reactants).

Re: Net number of molecules

Posted: Thu Oct 04, 2018 8:13 pm
by MichelleRamirez_2F
The net number of molecules would be the difference between the number of moles produced minus the number of moles you began with. You will know the number of moles of your reactants and products by adding the given coefficients in front of their respective molecules form the reaction. (Make sure your equation is balanced before you calculate it).