Problem: The semiconductor gallium arsenide, GaAs, is used in highspeed integrated circuits, light-emitting diodes, and solar cells. Its density is 5.32 g/cm3. It can be made by reacting trimethylgallium, Ga(CH3)3, with arsine gas, AsH3. The other product of the reaction is methane, CH4.If you reacted 600 g of trimethylgallium with 400 g of arsine, what mass of GaAs could you make?

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We are being asked to determine the amount of GaAs after the reaction of 600 g trimethylgallium with 400 g of arsine.


To solve this problem, we use the concept of limiting reactant or reagent

The limiting reactant or limiting reagent is the compound that determines the maximum amount of product obtained in a chemical reaction. 


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Problem Details

The semiconductor gallium arsenide, GaAs, is used in highspeed integrated circuits, light-emitting diodes, and solar cells. Its density is 5.32 g/cm3. It can be made by reacting trimethylgallium, Ga(CH3)3, with arsine gas, AsH3. The other product of the reaction is methane, CH4.

If you reacted 600 g of trimethylgallium with 400 g of arsine, what mass of GaAs could you make?

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