# Problem: Chromium(III) oxide reacts with hydrogen sulfide (H2S) gas to form chromium(III) sulfide and water: Cr2O3(s) + 3H2S(g) ⟶Cr2S3(s) + 3H2O(l) To produce 421 g of Cr2S3, how many moles of Cr2O3 are required?

###### FREE Expert Solution

We’re being asked to calculate the moles of Cr2Orequired to produce 421 g of Cr2S3 for the following reaction:

Cr2O3(s) + 3 H2S(g) ⟶ Cr2S3(s) + 3 H2O(l)

The flow for this problem will be like this:

Mass of Cr2S3 (molar mass of  Cr2S3) → Moles of Cr2S3 (mole-to-mole comparison)  Moles of Cr2O3 ###### Problem Details

Chromium(III) oxide reacts with hydrogen sulfide (H2S) gas to form chromium(III) sulfide and water:

Cr2O3(s) + 3H2S(g) ⟶Cr2S3(s) + 3H2O(l)

To produce 421 g of Cr2S3, how many moles of Cr2Oare required?

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Stoichiometry concept. You can view video lessons to learn Stoichiometry. Or if you need more Stoichiometry practice, you can also practice Stoichiometry practice problems.

What is the difficulty of this problem?

Our tutors rated the difficulty ofChromium(III) oxide reacts with hydrogen sulfide (H2S) gas t...as medium difficulty.

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What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Eddleton's class at VT.

What textbook is this problem found in?

Our data indicates that this problem or a close variation was asked in Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition. You can also practice Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition practice problems.