3.2 Concept Worksheet for Moles

# 3.2 Concept Worksheet for Moles - 1 What weight in grams is...

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Dr. Paul Moses 3.2 Concept Worksheet for Moles to/from Gram Conversion The molecular weight gives us the weight of a mole of that compound in grams. This allows us to convert from grams (easily measured) to moles (needed as a basis for converting to another substance where we know a ratio). In dimensional analysis, convert from grams to moles using the molecular weight with grams on bottom and convert from moles to grams using the molecular weight with grams on top. Practice Problems:
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Unformatted text preview: 1. What weight in grams is 2.5 moles of H 2 O? 2. What is the weight of 5.6 moles of C 2 H 6 ? 3. What is the weight of 4.3 moles of SO 3 ? 4. How many moles are there in 56g of water 5. A sample of SO 3 weighs 125g. How many moles is this? 6. 220g of CH 3 CH 2 OH is how many moles? 7. A sample weighing 45g contains 20% water. How many moles of water are in the sample? Answers: 1. 45 g 2. 170g 3. 340g 4. 3.1 moles 5. 1.6 moles 6. 4.8 moles 7. 9.0 g of water, 0.5 moles...
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