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Image0005 - b ———-9 What is the coefficient on H20...

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Unformatted text preview: b ———---9. What is the coefficient on H20 when the following equation is correctly balanced \/ Mg(OH)2 + HCl 9 MgClz + H20 A. 1 B. 2 C. 3 D. 5 "fl—10. Which one of the following reactions is not balanced? \/ A. CsHe(l) + 1502(9) 9 1ZCOZ(g) + 6H20(g) B. 8203(5) +6HF(I) 9 2BF3(g) + 3H20(l) C. UOg(g) + 4HF(l) —) UF4(s) + 2HgO(l) D. ZBngm + 1202(9) 9 53203(s) + 9 H20(g) L11. What are the correct symbols for the elements (1) copper and (2) cobalt? \/’/ A. Co, co B. Cu, Cb 0. Op, Cb D. Cu, Co _.D_.12- Which of the folloWing is a chemical change? \ 1. melting ice 3. making bread rise using baking soda ' 2. boiling an egg 4. boiling water A. 3 only B. 2 only C. 1 and 4 D. 2 and 3 D, 13. Which of the following is improperly labeled? k "/ A. Rn-noble gas B. 03- alkali metal C. Sr- alkaline earth metal D. Ag- metalloid C5 14. How many nitrogen atoms are in 175 molecules of Cu(N03)2 A. 800 B. 200 C. 350 D. 400 --P-"-—1§:'What is the equivalent of 130 K in degrees Fahrenheit? / t / . A. - 225 B. - 200 _ c. 328' D. 54 ( hint: C = K-273, F=9/5C + 32) ...
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