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.