a) Interpretation: What is wrong with the scheme given above is to be stated. Concept introduction: Friedal-Crafts reaction is not possible with aromatic rings that are substituted either by a strongly with-drawing group such as carbonyl, nitrile or an amino group that can be protonated. To state: What is wrong with the scheme given above.

Question

What is the average mass of the 10 pennies? Report your value with correct significant figures. What is the error (uncertainty) associated with each mass measurement due to the equipment? What is the uncertainty associated with the average value? Note that the uncertainty of the balance will propagate throughout the calculation. What is the standard deviation of the 10 mass measurements? Explain the difference between the propagated uncertainty and the standard deviation. Which number would you use to describe the uncertainty in the measurement? Calculate the total mass of the pennies with associated uncertainty. Calculate the average density of a penny based on these data. Propagate the uncertainty values for both mass and volume in your calculations.

Answer 1

Question

Chapter 16.10, Problem 23P

Interpretation Introduction

a)

Interpretation:

What is wrong with the scheme given above is to be stated.

Concept introduction:

Friedal-Crafts reaction is not possible with aromatic rings that are substituted either by a strongly with-drawing group such as carbonyl, nitrile or an amino group that can be protonated.

To state:

What is wrong with the scheme given above.

Interpretation Introduction

b)

Interpretation:

What is wrong in the scheme given above is to be stated.

Concept introduction:

Chlorine is an ortho & para director in aromatic electrophilic substitution reactions. It also deactivates the ring towards electrophiles to some extent. Alkyl groups are also ortho & para directors but they activate the ring towards electrophiles.

To show:

What is wrong with the scheme given.

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What is the average mass of the 10 pennies? Report your value with correct significant figures. What is the error (uncertainty) associated with each mass measurement due to the equipment? What is the uncertainty associated with the average value? Note that the uncertainty of the balance will propagate throughout the calculation. What is the standard deviation of the 10 mass measurements? Explain the difference between the propagated uncertainty and the standard deviation. Which number would you use to describe the uncertainty in the measurement? Calculate the total mass of the pennies with associated uncertainty. Calculate the average density of a penny based on these data. Propagate the uncertainty values for both mass and volume in your calculations.

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