CHEM 1E03 Chapter Notes - Chapter 1: Stoichiometry, Avogadro Constant, Sodium Chloride

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CHEM 1E03 Full Course Notes
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CHEM 1E03 Full Course Notes
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6. 600g x 1 mol/4. 003g x 6. 022 x 10 23 /mol = 9/929 x 10 23 atoms of he. 20. 0 g x 1 mol/18. 02 g x 6. 022 x 10 23 /mol = 6. 68 x 10 23 mol h 2 o. Example 1. 3: balance the following chemical reactions: mg(s) + cl 2 (g) mgcl 2 (s, 2ca(s) + o 2 (g) 2cao(s, ch 4 (g) + 2o 2 (g) co 2 (g) + 2h 2 o(g) The coefficients of the chemical reactions show the relative amounts of substances that react. Not necessarily the amounts used in reactions limiting reactant. Example 1. 4: suppose the following reaction is carried out with 30. 0 g of o 2 and 4. 00 g of h 2. 30. 0 g o 2 x 1mol/32g = 0. 9375 limiting reactant. 4 g h 2 x 1 mol/2g = 2. Example 1. 5: the density of copper is 8. 94 g ml -1 .

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