PLEASE HELP..!! PLEASE SHOW ALL STEPS FOR ALL QUESTIONS..THANK U..!! The decompo
ID: 892082 • Letter: P
Question
PLEASE HELP..!! PLEASE SHOW ALL STEPS FOR ALL QUESTIONS..THANK U..!!
The decomposition of H2O2 was studied and the concentration (in moles per liter) as a function of time was determined.
a) Create a spreadsheet in Microsoft Excel with the following columns and values. Calculate values for the natural logarithm of [H2O2] using an appropriate formula.
Time (s)
[H2O2] (M)
LN [H2O2]
0
0.862
120
0.556
240
0.394
360
0.246
480
0.149
b) Create a graph of [H2O2] versus time. Use the ‘Scatter’ chart type and use the subtype that connects the points with a line.
c) Create a graph of LN([H2O2]) versus time. Use the ‘Scatter’ chart type and use the subtype that does not connect the points with a line. Instead, insert a trendline (linear fit) and display the equation of the line on the graph.
d) Using the trendline equation, calculate the natural log of concentration (LN [H2O2]) corresponding to a time elapsed of 200 seconds. From that value, calculate the molar concentration of H2O2 at 200 seconds.
Time (s)
[H2O2] (M)
LN [H2O2]
0
0.862
120
0.556
240
0.394
360
0.246
480
0.149
Explanation / Answer
A) Time (sec) [H2O2] ln[H2O2] [ln x = 2.303 log x]
0 0.862 -0.148
120 0.556 -0.586
240 0.394 -0.931
360 0.246 -1.402
480 0.149 -1.903
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