# Chem Urgent!

What is the number of grams for 1 mol lead?

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1. the atomic mass in the periodic table represents the number of grams per one mol of lead. so there are 207.1 g per mol of lead.

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2. heating an ore of antimony and iron II sulfide.
Sb2S3+3Fe-->2Sb+3FeS
when 15g Sb2S3 reacts with an excess of Fe, 9.84g Sb is produced. what is the pecent yeild of this reaction?

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posted by lilly

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posted by lilly

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