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Free CLEP Science and Mathematics Exam Braindumps (page: 42)

Page 41 of 128
PDF with 494 Questions

How many moles of water are produced from the complete combustion of three moles of methane (CH4)?

  1. 10
  2. 8
  3. 6
  4. 4
  5. 2

Answer(s): C

Explanation:

The balanced combustion reaction is: CH4 + O2 CO2 + 2H2O.

Three moles of methane would produce twice as many moles of water, thus six moles of water are produced.





What is the hybridization state for C8?

  1. sp
  2. sp2
  3. sp3
  4. spy

Answer(s): C

Explanation:

Carbon with four single bonds hybridizes as sp3





Which atom has sp hybridization?

  1. C1
  2. C7
  3. O1
  4. O2
  5. None of the above

Answer(s): E

Explanation:

C1, C7, and O1 are sp2 hybridized, and O2 is sp3 hybridized.



What is the value of "y" in the following nuclear reaction?

235U92 yTh90 + 4He2

  1. 231
  2. 233
  3. 235
  4. 237
  5. 239

Answer(s): A

Explanation:

In nuclear reactions, the mass number must be balanced.






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