The approximate UV absorption maxima at which 2,3-dimethyl-1,3,5-hexatriene is expected to absorb is to be stated if 1,3,5-hexatriene has a UV absorption maximum of 258 nm. Concept introduction: A shift in UV absorption maxima to higher wavelengths is observed with increase in conjugation and/or with increase in the number of alkyl substituents. To state: The approximate UV absorption maxima at which 2,3-dimethyl-1,3,5-hexatriene is expected to absorb if 1,3,5-hexatriene has a UV absorption maximum of 258 nm.

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.

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Chapter 14.SE, Problem 49AP

Interpretation Introduction

Interpretation:

The approximate UV absorption maxima at which 2,3-dimethyl-1,3,5-hexatriene is expected to absorb is to be stated if 1,3,5-hexatriene has a UV absorption maximum of 258 nm.

Concept introduction:

A shift in UV absorption maxima to higher wavelengths is observed with increase in conjugation and/or with increase in the number of alkyl substituents.

To state:

The approximate UV absorption maxima at which 2,3-dimethyl-1,3,5-hexatriene is expected to absorb if 1,3,5-hexatriene has a UV absorption maximum of 258 nm.

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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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