Chromium (III) oxide reacts with hydrogen sulfide gas to form chromium (III) sulfide and water. a)writedown the balanced equation for the reaction. b)To produce 421 g of Cr2S3, how many moles of Cr2O3are required

The balanced chemical equation for the reaction can be computed as:

2.103 moles of  is being required.

Explanation:

The balanced chemical equation for the reaction can be computed as:

Recall that numbers of moles =

∴

number of moles of Cr2S3 =

number of moles of Cr2S3 = 2.103 moles

It  obvious from the balanced equation that:

1 mole of requires 1 mole of    

Thus; 2.103 moles of    = 2.103 × (1/1) moles of  

= 2.103 moles of  

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