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Percent Composition

Percent Composition. HW – Ques. 7.1. Find the mass of each of the following: 0.50 mole of NaOH 4.5 moles of CaCO 3 0.25 mole of Ba (NO 3 ) 2 3.00 moles of sodium oxide. HW – Ques. 7.2. How many moles are contained in each of the following: 60. grams of NaOH 75 grams of CaCO 3

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Percent Composition

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  1. Percent Composition

  2. HW – Ques. 7.1 Find the mass of each of the following: 0.50 mole of NaOH 4.5 moles of CaCO3 0.25 mole of Ba(NO3)2 3.00 moles of sodium oxide

  3. HW – Ques. 7.2 How many moles are contained in each of the following: 60. grams of NaOH 75 grams of CaCO3 26.1 grams of Ba(NO3)2 310 grams of sodium oxide

  4. HW – Ques. 7.3 If the mass of 0.60 mole of a certain substance is 72 grams, what is the molar mass of the substance? moles = grams molar mass

  5. Formula: % Composition Part Whole X 100% = % Composition

  6. % Composition From Mass There is 8.20g of Mg in 13.60g of MgO. What is the % composition of Mg, and O? Mg  8.20g 13.60g O  5.40g 13.60g 60.3% X 100% = 39.7% X 100% =

  7. % Composition From Mass Hg = 13.2g HgO = 14.2g Hg  13.2g 14.2g O  1.0g 14.2g 93.0% X 100% = 7.04% X 100% =

  8. % Composition From Formula What is the percent composition of water to 2 significant figures? H  2 X 1 = 2 O  1 X 16 = 16 18g/mole H  2g 18g O  16g 18g 11% X 100% = 89% X 100% =

  9. % Composition From Formula CuSO4 Find the percent composition of copper (II) sulfate? Cu  S O  Solve 1st Now Get Answers Cu 64 X100 = 40% 160 1 X 63.5 = 64 S32 X100 = 20% 160 1 X 32.1 = 32 O 64 X100 = 40% 160 4 X 16 = 64 160

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