Posted by **henry** on Monday, January 25, 2010 at 4:31pm.

4FeCr2O4+ 8K2CO3+7O2= 2Fe2O3+8K2CrO4+8CO2

how many grams of FeCr2O3 are required to produce 44g of CO2?

- chemistry -
**bobpursley**, Monday, January 25, 2010 at 4:38pm
44 g of CO2 is two moles, right?

We use the coefficents to make a mole ratio

2/8=x/4

so x is the moles of Iron(II) dichromate

So figure how many grams is x.

- chemistry -
**DrBob222**, Monday, January 25, 2010 at 4:42pm
1. Check your equation. I think you've made a typo. Fe2CrO4?? FeCrO4 perhaps? Then make sure the equation is balanced.

2. Convert 44 g CO2 to moles. moles = grams/molar mass.

3. Using the coefficients in the balanced equation, convert moles CO2 to moles of what you want.

4. Now convert moles from 3 to grams.

grams = moles x molar mass.

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