3.5 Concept Worksheet for formula stoichiometry with moles

# 3.5 Concept Worksheet for formula stoichiometry with moles...

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Dr. Paul Moses 3.5 Concept Worksheet for Formula Stoichiometry with Moles The coefficients in formulas tell you the relative numbers of each element. That number can either be atoms or moles of atoms. We will normally work in moles of atoms and molecules, so that is the typical problem. If you are given number of moles of either the compound or one of the elements, you can determine the moles of any other element from this ratio. Practice Problems: 1. How many moles of oxygen are there in 5.3 moles of water, H 2 O? 2. How many moles of iron are there in 2.4 moles of Fe 2 O 3 ? 3. A sample of H 2 O 2 has 1.63 moles of hydrogen. How many moles of oxygen
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Unformatted text preview: are there? 4. How many moles of oxygen are there in a sample of H 2 SO 4 that has 2.5 moles of hydrogen? 5. How many moles of CO 2 does it take in order to have 4.6moles of oxygen? 6. Jack burns 2.6 moles of Na to produce Na 2 O. How many moles of Na 2 O does he make? 7. A sample of Epsom salt, MgSO 4* 6H2O, is heated and 1.25 moles of water are driven off. How many moles of Epsom salt were there. Note that all of the water is lost. Answers: 1. 5.3 moles of oxygen. 2. 4.8 moles of iron 3. 1.63 moles of oxygen 4. 5.0 moles of oxygen 5. 2.3 moles of carbon dioxide 6. 1.3 moles of Na 2 O 7. 0.208 moles of Epsom salt...
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