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practice. How many grams of H 2 O are produced by completely reacting 24 g of O 2 ? 2 H 2 + O 2  2 H 2 O convert to moles  convert to the desired molecule  convert to grams O 2 = 32.00 g/mol ; H 2 O = 18.016 g/mol. = 27 g H 2 O. Another.

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practice

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  1. practice • How many grams of H2O are produced by completely reacting 24 g of O2? • 2 H2 + O2 2 H2O • convert to moles  convert to the desired molecule  convert to grams • O2 = 32.00 g/mol ; H2O = 18.016 g/mol = 27 g H2O

  2. Another • How many grams of H2 are needed to form 34 g of H2O? • 2 H2 + O2 2 H2O • convert to moles  convert to the desired molecule  convert to grams • H2 = 2.016 g/mol ; H2O = 18.016 g/mol = 3.8 g H2

  3. Balance the equation 1st, then do the problem 2 2 • Na + Cl2 NaCl • How many grams of chlorine are needed to react with 37 g of Na? =57 g Cl2

  4. More • CH4 + O2 H2O + CO2 • How many grams of CH4 are needed to make 120 g of H2O? 2 2 = 53 g CH4

  5. Homework • HNO3 + Sc → Sc(NO3)3 + H2 • How many grams of scandium III nitrate will be produced from 28.2 g of nitric acid?

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