O5.00L D) 5.46 L E) 10.0L 18) Which of the following is an observed property of gases? A) gases vary in shape and volume B) gases expand infinitely C) gases have low density D) gases mix completely E) all of the above Answer: 19) A sample ofneon gas at 120 atm compresses from 0.250 L to 0.125 L lfte temperature remains constant, what is the final pressure? A) 0.600 atm B) 1.00 atm C) 1.20 atm D) 2.40 atm E) none of the above Answer: 20) The compound Co(NO3)3 is classified as which of the following? A) binary ionic B) ternary ionic C) binary molecular D) binary acid E) temary oxyacid Answer 21) Predict which of the following is connected by a covalent bond. A)ICI B) BrF C) HBr D) all of the above E) none of the above E) Predict which of the following is connected by a covalent bond. Answer: many valence electrons are in an oxygen atom and an oxide ion? 22) How A) 2 and 8, respectively B) 6 and 8, respectively C) 8 and 6, respectively D) 8 and 10, respectively E) none of the above Answer 23) Which of the following statements is true regarding a covalent bond between two nonmetal atoms in a A) B) molecule? Valence electrons are shared between two nonmetal atoms. Bonding electrons are distributed over the entire molecule. Solution 18) E as gases have all the above qualties. 19) D using P1V1=P2V2 20) B as it dissociates in 3 species. 21) B as electronic configuration is 1S 2 2S 2 2P 4 for oxygen atom. and 1S 2 2S 2 2P 6 for oxide atom. .