Author Question: When the following equation is balanced, the coefficient of sulfur dioxide is ________. PbS (s) + O2 ... (Read 31 times)

@Brianna17 · **on:** Aug 27, 2018

When the following equation is balanced, the coefficient of sulfur dioxide is ________. PbS (s) + O2 (g) PbO (s) + SO2 (g)

A) 5
B) 1
C) 3
D) 2
E) 4

Question 2

The correct result (indicating the proper number of significant figures) of the following addition is ________. 12 1.2 0.12 + 0.012

A) 13
B) 13.3
C) 13.33
D) 13.332
E) none of the above

Question 3

The reaction 2NO2 2NO + O2

follows second-order kinetics. At 300 C, NO2 drops from 0.0100 M to 0.00650 M in 100.0 s. The rate constant for the reaction is ________ M-1s-1.
A) 0.096
B) 0.65
C) 0.81
D) 1.2
E) 0.54

Question 4

Many common garden plants are poisonous.

Indicate whether the statement is true or false

cloud · **Reply #1 on:** Aug 27, 2018

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