What is not a characteristic of acids
A. taste bitter
B. react with bases to form salts
C. pH values lower than 7
D. release hydrogen ion(s) in aqueous solution
When water freezes it expands- what fills the
A moleculeel of water contains hydrogen and oxygen in a 1:8 ratio by
mass. This is a statement of
the law of constant composition
Which one of the following is not one of the postulates of Dalton's
Atoms are composed of protons, neutrons
A sample of gas (24.2 g) initially at 4.00 atm was compressed from 8.00 L to 2.00 L at constant temperature. After the compression, the gas
pressure was _ atm.
A balloon originally had a volume
In the Lewis symbol for a fluorine atom, there are _ paired and _ unpaired electrons.
A. 4, 2
B. 0, 5
C. 2, 5
D. 6, 1
Which of the following would have to gain two electrons in order to achieve a noble gas electron configurati
The wavelength of light that has a frequency of 1.20 1013 s-1 is _ m.
A. 2.50 10-5
What is the frequency of light (s-1) that has a wavelength of 3.12 10-3 cm?
B. 4.10 10-17
C. 9.62 1012
There are _ paired and _ unpaired electrons in the Lewis symbol for a phosphorus atom.
A. 4, 2
B. 2, 4
C. 4, 3
D. 0, 3
E. 2, 3
Based on the octet rule, phosphorus most likely forms a _ ion.
For a molecule with the formula AB2 the molecular shape is _.
A. linear or trigonal planar
C. trigonal planar
D. linear or bent
E. linear or T-shaped
The molecular geometry of _ is square planar.
Combining aqueous solutions of BaI2 and Na2SO4 affords a precipitate of BaSO4. Which ion(s) is/are spectator ions in the reaction?
A. Ba2+ only
B. Ba2+ and SO42-
C. Na+ only
D. SO42- and I-
E. Na+ and I-
The balanced net ionic equati