Which of the following is not part of Dalton-'s atomic theory- a- Atom.docx

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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 .

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1. The atoms of different elements have: A) the same atomic number and same atomic weight. B) the same atomic number but different atomic weights. C) different atomic numbers. D) different atomic numbers but the same number of electrons. 2. If atoms of the same element combine they form a/an---------, , if atoms of different elements combine they form a/an--------- 3. The formula H2O refers to A) Two hydrogen molecules and one oxygen molecule. B) One hydrogen molecule and two oxygen molecules. C) A molecule that contains two hydrogen atoms and one oxygen atom. D) A molecule that contains one hydrogen atom and two oxygen atoms. 4. A chemical reaction in which parts of different molecules trade positions is a(n) A) decomposition reaction. B) exchange reaction. C) reversible reaction. D) synthesis reaction. 5. ___________________ are molecules that influence the speed of chemical reactions and are not consumed in the process. .

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