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Atoms, Formulas, Reactions

Atoms, Formulas, Reactions - Unit 2 Atoms Formulas and...

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Unit 2: Atoms, Formulas and Reactions 50 point quiz (MC = 2 points each, SA = 1 point each) 1. What is the charge of the nucleus in an atom of oxygen- 17? a. 0 b. -2 c. +8 d. +17 2. What is the total number of electrons in a S 2- ion? 3. Which represents an atom with atomic number of 11 and mass number of 24? 4. Atoms of different isotopes of the same element differ in their total number of 5. Given: F 2 (g) + H 2 (g) → 2HF(g). What is the ratio of H 2 (g) to HF(g)? a. 1:1 b. 1:2 c. 2:1 d. 2:3 6. Which lists 3 types of reactions? 7. Given: 2CO(g) + O 2 (g) → 2CO 2 (g). What is the mole ratio of CO(g) to CO 2 (g) in this reaction?
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