7. Consider the following specific heats of metals Metal copper 0.385 Jg.\"C chr

Question

7. Consider the following specific heats of metals Metal copper 0.385 Jg."C chromium 0.447 JICg "C) silver Metal cobalt 0418 JIg "C) gold 0.129 Jig-C) 0.237 Jig . "C) 100-g samples of each of the metals at 95 °C are added to 100 mL of water at 25-C. Which element will increase the temperature of the water the least? a. copper b. cobalt c. chromium d. gold e. silver 8. From the Bohr model of the hydrogen atom we can conclude that the energy required to excite an the energy to excite an electron from n = 3 to n-4. electron from n = 2 to n = 3 is a. less than b. greater than c. equal to d. either equal to or less than e. either equal to or greater than 9. Which of the following orbital diagrams is IMPOSSIBLE according to the Pauli exclusion principle? 1s 2s b. C. e. 10. Which one of the following has a molecular shape most like that of the carbonate ion?

Explanation / Answer

7. decreasing specific heat,decreases amount of heat change per degree celcius change in temperature.

answer: d.gold

8. answer: b. greater than

9. pauli exclusion principle: no two eelctrons can have same set of four quantum numbers in an atom.

answer: b

10. answer: d.H2CO , trigonal planar.

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