7. In an electrolytic cell A. a chemical reaction occurs spontaneously and relea

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7. In an electrolytic cell A. a chemical reaction occurs spontaneously and releases energy as electricity. B. electricity causes a chemical reaction to occur C. a physical change occurs spontaneously and releases energy as electricity D. electricity causes a physical change to occur In a voltaic cell A. a chemical reaction occurs spontaneously and releases energy as electricity B. electricity causes a chemical reaction to occur C. a physical change occurs spontaneously and releases energy as electricity D. electricity causes a physical change to occur 8. 9. Which specie ii fowing equation? 2 Ca 2Co B. O C. Ca D.o 10. Which occurs when a calcium atom is oxidized? A. Two protons are lost C. Two electrons are lost B. Two protons are gained D. Two electrons are gained Which occurs when an oxygen atom is reduced? A. Two protons are gained C. Two electrons are gained 11. B. Two protons are lost D. Two clectrons are lost 12 In the following reaction, the chlorine atoms 2 Na Cl: 2 NaCI A. gain electrons. B. lose electrons. C. gain protons. D. lose protons 13. In the following reaction, the zine atoms Zn +2 Ag Zn2+2 Ag B.lose protons. C.gain electrons. D.lose electrons. A. gain protons. In a voltaic cell, oxidation occurs at the A. Anode 14. B. Cathode C. Internal circuit D. External circuit 15. The reaction: Ba + Cuo BaO Cu, will occur if A. Cu is more active than Ba C. Ba is more active than O B. Ba is more active than Cu D. O is more active than Cu The reaction: Cl2 + 2 KBr ? 2 KCl + Br2. will occur if A. K is more active than Ci C. K is more active than Br 16. B. Cl is more active than Br D. Br is more active than Cl Chapter Ten: Chemical Calculations and Chemical Equations How many moles of carbon dioxide are produced when 3.00 moles of oxygen react completely in the following equation? CHs + 5 0-3 CO2 + 4 H2O A, 1.80 1. B, 3.00 C, 5.00 D, 9.00 2. How many moles of Ch are consumed when 0.500 moles of AICl, are produced in the following equation? 2 Al 3Ch 2 AICh ?.0.333 ?.0.500 C, 0.750 D.100

Explanation / Answer

Ans 7 : B) electricity causes a chemical reaction to occur

The spontaneous reactions are the ones that occur without the expense of external energy , whereas the non spontaneous reactions require the use of external energy for the redox chemical reactions to occur.

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