9. What is the amount of oxygen in 200.0 mg of an unknown compound, if 100.0 g of the compound contains 49.93 g O? (A) 0.02497 g (C) 24.98 g (B) 0.09986 g (D) 99.86 g 10. What is the thickness of 5.79-mg of gold leaf evenly spread over an area of 44.6 cm2? (Density of gold is 19.3 g/cm³.) (A) 6.73 x 10-6 cm (C) 6.73 x 10³ cm (B) 1.20 × 10³ cm (D) 2.78 x 102 cm

9. What is the amount of oxygen in 200.0 mg of an unknown compound, if 100.0 g of the compound contains 49.93 g O? (A) 0.02497 g (C) 24.98 g (B) 0.09986 g (D) 99.86 g 10. What is the thickness of 5.79-mg of gold leaf evenly spread over an area of 44.6 cm2? (Density of gold is 19.3 g/cm³.) (A) 6.73 x 10-6 cm (C) 6.73 x 10³ cm (B) 1.20 × 10³ cm (D) 2.78 x 102 cm

Chemistry & Chemical Reactivity

10th Edition

ISBN:9781337399074

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter2: Atoms Molecules And Ions

Section: Chapter Questions

Problem 165SCQ

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