chem hw 5.docx - 2 7 9 12 14 22 24 30 34 40 48 52 58 62 66...

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2, 7, 9, 12, 14, 22, 24, 30, 34, 40, 48, 52, 58, 62, 66, 70, 76 and 80 on the end of chapter 5 1- The law of constant composition states: A) Matter cannot be either created or destroyed in a chemical reaction. B) The nucleus is a dense region of positive charge that always contains protons and neutrons. C) All samples of a given compound have the same proportions of their constituent elements. D) All atoms of a given element have a constant composition and are different than atoms of any other element. E) none of the above 2-How many of each type of atoms are there in the formula NH 4 C 2 H 3 O 2 ? A) N = 4, H = 7, C = 2, O = 2 B) N = 1, H = 4, C = 2, O = 2 C) N = 1, H = 3, C = 2, O = 2 D) N = 1, H = 7, C = 2, O = 2 E) none of the above 3- What is the correct formula for a compound that has three oxygen atoms and one sulfur atom? A) O 3 S B) SO 3 C) 3OS D) SO3 E) none of the above 4- Which among the following elements does NOT exist as a diatomic molecule in nature?
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A) hydrogen B) nitrogen C) fluorine D) neon E) none of the above 5- Fluorine is considered which of the following?
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