Author Question: In nature, sulfur is most commonly found in ________. A) pure elemental sulfur B) sulfur oxides ... (Read 263 times)

washai · **on:** Aug 27, 2018

In nature, sulfur is most commonly found in ________.

A) pure elemental sulfur
B) sulfur oxides
C) metal sulfides
D) sulfuric acid
E) H2S

Question 2

At elevated temperatures, dinitrogen pentoxide decomposes to nitrogen dioxide and oxygen: 2N2O5(g) 4NO2 (g) + O2 (g) When the rate of formation of NO2 is 5.5 10-4 M/s, the rate of decomposition of N2O5 is ________ M/s.

A) 2.2 10-3
B) 1.4 10-4
C) 10.1 10-4
D) 2.8 10-4
E) 5.5 10-4

Question 3

The combustion of propane (C3H8 ) in the presence of excess oxygen yields CO2 and H2O: C3H8 (g) + 5O2 (g) 3CO2 (g) + 4H2O (g) When 2.5 mol of O2 are consumed in their reaction, ________ mol of CO2 are produced.

A) 1.5
B) 3.0
C) 5.0
D) 6.0
E) 2.5

Question 4

Which of the following molecules has hydrogen bonding as its only intermolecular force?

A) HF
B) H2O
C) C6H13NH2
D) C5H11OH
E) None, all of the above exhibit dispersion forces.

jxjsniuniu · **Reply #1 on:** Aug 27, 2018

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