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15. Capillary columns are open tubular columns constructed from which of the following materials? a) Glass b) Metal c) Stainless steel d) Fused silica 16. The Calcium Ca² (40.08 g/mol) in a 200 ml sample was precipitated and ignited to give CaO (56.08 g/mol) a weight of 0.1132 g Calculate the mass of Ca/100 ml? a) 40.38 b) 0.040 c) 46.04 d) 33.32 17. The difference between the experimental value and the true value is called: a) relative error b) precision c) accuracy d) absolute error

15. Capillary columns are open tubular columns constructed from which of the following materials? a) Glass b) Metal c) Stainless steel d) Fused silica 16. The Calcium Ca² (40.08 g/mol) in a 200 ml sample was precipitated and ignited to give CaO (56.08 g/mol) a weight of 0.1132 g Calculate the mass of Ca/100 ml? a) 40.38 b) 0.040 c) 46.04 d) 33.32 17. The difference between the experimental value and the true value is called: a) relative error b) precision c) accuracy d) absolute error

Chemistry by OpenStax (2015-05-04)
Chemistry by OpenStax (2015-05-04)
1st Edition
ISBN:9781938168390
Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Chapter15: Equilibria Of Other Reaction Classes
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15. Capillary columns are open tubular columns constructed from which of the following materials? a) Glass b) Metal c) Stainless steel d) Fused silica 16. The Calcium Ca2 (40.08 g/mol) in a 200 ml sample was precipitated and ignited to give CaO (56.08 g/mol) a weight of 0.1132 g Calculate the mass of Ca/100 ml? a) 40.38 b) 0,040 c) 46.04 d) 33.32 17. The difference between the experimental value and the true value is called: a) relative error b) precision c) accuracy d) absolute error 18.A 500 ml of water sample is found to contain 0.0014 g of CaCO (M Wt 100 g/mol). Calculate the concentration of CaCO, in parts per million (ppm). a) 2.80 b) 1.4 x 10² c) 5.60 d) 1.40 19. Given a 7.50 x 10 M solution of KMnO, that has a transmittance of 36.4% when measured in a 1.0 cm cell at a wavelength of 525 nm. Calculate the absorbance of this solution a) 191.1 b) 0.439 c) 273x10 d) 32 x 10 20. Calculate the molar absorbtivity of the above KMnO, solution: a) 584 cm'mol L b) 585 x 10 cmmor L c) 25.48 x 10 cm'mol L d) 1.87 x 10 cm mot 21. In Gas-liquid phase chromatography, the stationary phase is composed and the mobile phase is made of of a Solid liquid b)Liquid liquid c)Liquid gas d) Solid, gas
Transcribed Image Text:15. Capillary columns are open tubular columns constructed from which of the following materials? a) Glass b) Metal c) Stainless steel d) Fused silica 16. The Calcium Ca2 (40.08 g/mol) in a 200 ml sample was precipitated and ignited to give CaO (56.08 g/mol) a weight of 0.1132 g Calculate the mass of Ca/100 ml? a) 40.38 b) 0,040 c) 46.04 d) 33.32 17. The difference between the experimental value and the true value is called: a) relative error b) precision c) accuracy d) absolute error 18.A 500 ml of water sample is found to contain 0.0014 g of CaCO (M Wt 100 g/mol). Calculate the concentration of CaCO, in parts per million (ppm). a) 2.80 b) 1.4 x 10² c) 5.60 d) 1.40 19. Given a 7.50 x 10 M solution of KMnO, that has a transmittance of 36.4% when measured in a 1.0 cm cell at a wavelength of 525 nm. Calculate the absorbance of this solution a) 191.1 b) 0.439 c) 273x10 d) 32 x 10 20. Calculate the molar absorbtivity of the above KMnO, solution: a) 584 cm'mol L b) 585 x 10 cmmor L c) 25.48 x 10 cm'mol L d) 1.87 x 10 cm mot 21. In Gas-liquid phase chromatography, the stationary phase is composed and the mobile phase is made of of a Solid liquid b)Liquid liquid c)Liquid gas d) Solid, gas
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