Please help with questions 4, 5, 6 and 7. The equation of the line is y = 0.0966x+0.205 V knmL1.01.52.02.53.03.54.04.55.05.56.06.5*%T knA knKnown.220.21.4949.62.65c knV unkmL20191817161514131211108*%TunkA unkunknown48.42.34• 1924cunk(M)27c stock(M) 4.5.6.7.Use the slope of the line to find the absorptivity ofCu(NH3)4 at 600 nm.2+Use the absorptivity from question 4 to find the molarconcentration of Cu(NH3)4* in each of the unknown testsolutions.From each unknown test solution, calculate the molarconcentration of copper(II) ion in the unknown stocksolution. These values should all be the same; anydifference is due to error. Find the average and thestandard deviation of the values.Use the average molar concentration of copper in theunknown stock solution from question 6, and the mass ofpennies per liter in the unknown stock solution, to find themass-percent of copper in the new penny. Use the errorcalculation in question 6 to estimate the correct number ofsignificant figures in your final answer.

“Since you have posted a question with multiple sub-parts, we will solve the first three subparts…

Use the slope of the line to find the absorptivity of 2+ Cu(NH3)4 at 600 nm. 2+ Use the absorptivity from question 4 to find the molar concentration of Cu(NH3)42* in each of the unknown test solutions.

Use the slope of the line to find the absorptivity of 2+ Cu(NH3)4 at 600 nm. 2+ Use the absorptivity from question 4 to find the molar concentration of Cu(NH3)42* in each of the unknown test solutions.

Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter6: Chemical Reactions: An Introduction

Section: Chapter Questions

Problem 5ALQ: Can the subscripts in a chemical formula be fractions? Explain.

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Question

Please help with questions 4, 5, 6 and 7. The equation of the line is y = 0.0966x+0.205

V kn
mL
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
*
%T kn
A kn
Known
.22
0.21
.49
49
.62
.65
c kn
V unk
mL
20
19
18
17
16
15
14
13
12
11
10
8
*
%T
unk
A unk
unknown
48
.42
.34
• 19
24
cunk
(M)
27
c stock
(M)

4.
5.
6.
7.
Use the slope of the line to find the absorptivity of
Cu(NH3)4 at 600 nm.
2+
Use the absorptivity from question 4 to find the molar
concentration of Cu(NH3)4* in each of the unknown test
solutions.
From each unknown test solution, calculate the molar
concentration of copper(II) ion in the unknown stock
solution. These values should all be the same; any
difference is due to error. Find the average and the
standard deviation of the values.
Use the average molar concentration of copper in the
unknown stock solution from question 6, and the mass of
pennies per liter in the unknown stock solution, to find the
mass-percent of copper in the new penny. Use the error
calculation in question 6 to estimate the correct number of
significant figures in your final answer.

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