8) Answer question 1 from Chapter 4 in your book. You may use excel to answer...

    

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8) Answer question 1 from Chapter 4 in your book. You may use excel to answer this question. Just make sure to provide an example of your calculations with it. Hints: a. Determine the molar weight of each oxide b. Determine the % of each cation and oxygen in the oxide. This will be the cation and oxygen mole% c. Determine the ratio of the weight % of the oxide to its molar weight. This is useful converting the elemental concentration as molar to weight. d. Multiply the ratio from part c by each cation mole% to get the weight of each cation in the oxide. e. Multiply the ratio from part c by each oxygen mole% to get the weight of each oxygen in the oxide. f. Sum the weights of each cation to get a total cation weight. g. Sum the weights of each oxygen to get a total oxygen weight. h. Sum the total cation weight with the total oxygen weight to get the total elemental weight in the sample. i. Divide each cation weight from part e by the total elemental weight to get a weight % for each cation in the sample j. Divide the total oxygen weight from part g by the total elemental weight to get the weight% of oxygen in the sample. A B C A A В DB Wt% as Oxide Molar wt oxides 60.08 g/mol J K L M N F from XRF Cation Wt Proportion in XRF G O Wt Proportion in XRF each cation in oxide H Percentage E F G H C Cation mole % D Oxygen Mole % Mol prop of oxides E E in oxides SiO2 45.2 MgO 37.5 40.3044 g/mol FeO 8 71.844 g/mol Al203 3.5 101.96 g/mol CaO 3.1 56.0774 g/mol Na20 0.57 61.9789 g/mol Cr203 0.43 151.99 g/mol MnO 0.14 70.9374 g/mol P205 0.06 283.889 g/mol K20 0.13 94.2 g/mol TiO2 0.17 79.866 g/mol NiO 74.6928 g/mol Total 98.8 Column Sum 0.000 0.000 0.000 A B = Chemical Composition of Pyrolite (taken from Table 4.2) Molecular Weight of Oxide (Molecular Wt of cation in oxide/ column B) * 100 Total Elements C = D 100 - Column C E = Column A/Column B F = G Sum Total Elements Sum Column C * Column E Column D * Column E of Column F and G = Sum F + Sum G Column H % of oxygen in XRF = 100 sum column H Column H represents the % of each cation in the oxide % of Oxygen in the Pyrolite sample measured by the XRF 0.000 Percentage of Oxygen in XRF 100 8) Answer question 1 from Chapter 4 in your book. You may use excel to answer this question. Just make sure to provide an example of your calculations with it. Hints: a. Determine the molar weight of each oxide b. Determine the % of each cation and oxygen in the oxide. This will be the cation and oxygen mole% c. Determine the ratio of the weight % of the oxide to its molar weight. This is useful converting the elemental concentration as molar to weight. d. Multiply the ratio from part c by each cation mole% to get the weight of each cation in the oxide. e. Multiply the ratio from part c by each oxygen mole% to get the weight of each oxygen in the oxide. f. Sum the weights of each cation to get a total cation weight. g. Sum the weights of each oxygen to get a total oxygen weight. h. Sum the total cation weight with the total oxygen weight to get the total elemental weight in the sample. i. Divide each cation weight from part e by the total elemental weight to get a weight % for each cation in the sample j. Divide the total oxygen weight from part g by the total elemental weight to get the weight% of oxygen in the sample. A B C A A В DB Wt% as Oxide Molar wt oxides 60.08 g/mol J K L M N F from XRF Cation Wt Proportion in XRF G O Wt Proportion in XRF each cation in oxide H Percentage E F G H C Cation mole % D Oxygen Mole % Mol prop of oxides E E in oxides SiO2 45.2 MgO 37.5 40.3044 g/mol FeO 8 71.844 g/mol Al203 3.5 101.96 g/mol CaO 3.1 56.0774 g/mol Na20 0.57 61.9789 g/mol Cr203 0.43 151.99 g/mol MnO 0.14 70.9374 g/mol P205 0.06 283.889 g/mol K20 0.13 94.2 g/mol TiO2 0.17 79.866 g/mol NiO 74.6928 g/mol Total 98.8 Column Sum 0.000 0.000 0.000 A B = Chemical Composition of Pyrolite (taken from Table 4.2) Molecular Weight of Oxide (Molecular Wt of cation in oxide/ column B) * 100 Total Elements C = D 100 - Column C E = Column A/Column B F = G Sum Total Elements Sum Column C * Column E Column D * Column E of Column F and G = Sum F + Sum G Column H % of oxygen in XRF = 100 sum column H Column H represents the % of each cation in the oxide % of Oxygen in the Pyrolite sample measured by the XRF 0.000 Percentage of Oxygen in XRF 100

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SOLUTION To answer this question we need to use the information given in the table above which shows the chemical composition of pyrolite taken from Table 42 and the molecular weight of each oxide Ste... View the full answer