Which one of the following statements about atomic structure is false? A. An atom is mostly empty space. B. Almost all of the mass of the atom is concentrated in the nucleus. C. The protons and neutrons in the nucleus are very tightly packed. D. The number of protons and neutrons is always the same in the neutral atom. E. All of the above statements (A-D) are true. Using the information below, calculate D H f for PbO(s) PbO(s) + CO(g) ® Pb(s) + CO 2(g) D H°-131.4 kJ DH f for CO 2(g) = -393.5 kJ/mol DH f for CO(g) = -110.5 kJ/mol A. -372.6 kJ/mol B.-151.6 kJ/mol C. +283.0 kJ/mol D. +252.1 kJ/mol E. -283.0 kJ/mol

Which one of the following statements about atomic structure is false? A. An atom is mostly empty space. B. Almost all of the mass of the atom is concentrated in the nucleus. C. The protons and neutrons in the nucleus are very tightly packed. D. The number of protons and neutrons is always the same in the neutral atom. E. All of the above statements (A-D) are true. Using the information below, calculate D H f for PbO(s) PbO(s) + CO(g) ® Pb(s) + CO 2(g) D H°-131.4 kJ DH f for CO 2(g) = -393.5 kJ/mol DH f for CO(g) = -110.5 kJ/mol A. -372.6 kJ/mol B.-151.6 kJ/mol C. +283.0 kJ/mol D. +252.1 kJ/mol E. -283.0 kJ/mol

Introductory Chemistry: An Active Learning Approach

6th Edition

ISBN:9781305079250

Author:Mark S. Cracolice, Ed Peters

Publisher:Mark S. Cracolice, Ed Peters

Chapter5: Atomic Theory : The Nuclear Model Of The Atom

Section: Chapter Questions

Problem 5.4TC

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