Octane, C_1H_11, is a major component of gasoline. Write the balanced formula un

Question

Octane, C_1H_11, is a major component of gasoline. Write the balanced formula unit equation for the reaction of the complete combustion of octane. What is the sum of the coefficients? a. 49 b. 17 c. 50 d. 73 e. 61 The brownish color of photochemical smog is due to. a. NO_2 b. CO c. NO d. SO_2 e. SO_3 CocnbuMsoa of fossil fuels contaminated with sulfur leads to what phenomena? a. ozone destruction b. greenhouse effect c. global warming d. acid ram e. photochemical smog An element that has the same ground state valence-shell electron configuration as silicon is a. gallium. b. lithium. c. argon. d. magnesium. e. lead. An atom of which of the following elements has the largest second ionization energy? a. Pb b. At c. Po d. Cs e. Ba Which of the following species is isoelectronic with Ar? a. Na^+ b. Ca^2+ c.Ga^3+ d.O^3- e. Ne

Explanation / Answer

Hi,

26. 2C8H18+ 25O2 ------> 16CO2 + 18H2O

sum of coefficients= 2+25+16+18= 61

ans: (e)

27. (a) NO2

28. (d) acid rain

29. (e) Lead

30. (d) Cs

31. (b) Ca2+

Thank you

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