Net number of molecules

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Krista Mercado 1B
Posts: 60
Joined: Fri Sep 28, 2018 12:26 am

Net number of molecules

Postby Krista Mercado 1B » Tue Oct 02, 2018 3:19 pm

How do you calculate the net number of moles produced in a balanced chemical reaction?

Jeffrey Xiao 4A
Posts: 35
Joined: Fri Sep 28, 2018 12:28 am
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Re: Net number of molecules

Postby Jeffrey Xiao 4A » Tue Oct 02, 2018 3:34 pm

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

lindsey_ammann_4E
Posts: 61
Joined: Fri Sep 28, 2018 12:26 am

Re: Net number of molecules

Postby lindsey_ammann_4E » Thu Oct 04, 2018 5:28 pm

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).

MichelleRamirez_2F
Posts: 63
Joined: Fri Sep 28, 2018 12:28 am

Re: Net number of molecules

Postby MichelleRamirez_2F » Thu Oct 04, 2018 8:13 pm

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).


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