What is the best explanation for the variation of physical properties
between these two compounds?
(A) The H 2 S has stronger bonds between molecules.
(B) The H 2 O has a great deal of hydrogen bonding.
(C) The bond angles differ by about 15°.
(D) The formula mass is of prime importance.
(E) The oxygen atom has a smaller radius and thus cannot bump into
other molecules as often as the sulfur.
- What is the pOH of a solution that has 0.00001 mole of H 3 O+/liter of
solution?
(A) 2
(B) 3
(C) 4
(D) 5
(E) 9
- How many grams of sulfur are present in 1 mole of H 2 SO 4?
(A) 2
(B) 32
(C) 49
(D) 64
(E) 98
- What is the approximate mass, in grams, of 1 liter of nitrous oxide, N 2 O, at
STP?
(A) 1
(B) 2
(C) 11.2
(D) 22
(E) 44
- If the simplest formula of a substance is CH 2 and its molecular mass is 56,
what is its true formula?
(A) CH 2
(B) C 2 H 4
