To determine the mass of silver sulfide (Ag2S) produced in the reaction, we need to first find out how many moles of Ag2S are produced based on the moles of silver (Ag) used in the reaction.
From the balanced chemical equation:
We see that 2 moles of silver yield 1 mole of silver sulfide. If 0.04 moles of silver are used, we can determine the moles of silver sulfide produced:
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Calculate the moles of Ag2S produced:
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Now, we need to calculate the molar mass of Ag2S:
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Finally, we calculate the mass of Ag2S produced using the moles of Ag2S and its molar mass:
Thus, the correct steps that show how to determine the mass of silver sulfide produced are:
Step:
This matches with the third option listed:
3.