1.
Which of the following is not part of Dalton's atomic theory? a. Atoms combine in whole-
number ratios b. Chemical reactions involve a rearrangemen c. All atoms of a given eleme d. to
form chemical compounds. t of the atoms in the starting materials. nt have identical m ass and
chemical properties All matter is composed of small indivisible particles called atoms. Atoms of
one element can be changed to atoms of another element in a chemical reaction. e. 74. The
correct formula for tetraphosphorus hexasulfide is: a. PS b. P5S6 c. P4S6 d. P5S7 e. P4S7 75.
Consider the following reaction 4M13(g) + 702(g) ? 4NO2(g) + 6H20? The equilibrium constant
expression is K= [NO2][II?/[NI13][02] a.
Solution
73. e. Atoms of one element can be changed to atoms of another element in a chemical reaction.
74. c. P 4 S 6
75. d. K = [NO 2 ] 4
/[NH 3 ] 4
[O 2 ] 7