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What mass of carbon is needed to react completely with 45.0 g of sand?

What mass of carbon is needed to react completely with 45.0 g of sand? - Chemistry Forum

What mass of carbon is needed to react completely with 45.0 g of sand? - Chemistry Forum. Discuss chemical reactions, chemistry.


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Old 06-28-2009, 11:21 AM
Pipette Filler
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Default What mass of carbon is needed to react completely with 45.0 g of sand?



SiO2(s)+2C(s) arrow Si(s)+2CO(g)

What mass of carbon is needed to react completely with 45.0 g of sand?

I did it and got 18 g of carbon....is this correct?
I found the molar mass of sand (SiO2), then converted 45g of sand to moles of sand, then used the ratio of carbon to sand to figure out how many moles of C are required to react with the given amount of sand. I then converted the moles of C to g. Did I do anything wrong? A step by step answer would help me out a lot!
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