chemistry grams

llleah1 · #1 Mar 19, 2007, 10:09 AM

if you have a balanced equation and already know the grams of one substance but need to find the grams another substance. how do you do that?

rudi_in · Mar 19, 2007, 10:40 AM

Thank you for posting your question to the Ask Me Help Desk.

You will need to multiply by three conversion factors...

Start with the mass of the given and

1. multiply by (1 mol given) / (molar mass of the given)

2. multiply by molar ratio of the needed to the given (mol needed / mol given) **Use the coefficients from the balanced equation**

3. multiply by (molar mass of the needed) / (1 mol needed)



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