The molecule, methylacetamide is polar or not has to be identified. Concept Introduction: The unequal distribution of shared electrons caused by differences in electronegativity between bonded atoms is called bond polarity. A molecule is non-polar, if the charge distribution is symmetric and a molecule is polar if the charge distribution is asymmetric. I a molecule us symmetric in shape it is said to be non-polar. If a molecule is not regular, it is said to be polar.

Question

There is an instrument in Johnson 334 that measures total-reflectance x-ray fluorescence (TXRF) to do elemental analysis (i.e., determine what elements are present in a sample). A researcher is preparing a to measure calcium content in a series of well water samples by TXRF with an internal standard of vanadium (atomic symbol: V). She has prepared a series of standard solutions to ensure a linear instrument response over the expected Ca concentration range of 40-80 ppm. The concentrations of Ca and V (ppm) and the instrument response (peak area, arbitrary units) are shown below. Also included is a sample spectrum. Equation 1 describes the response factor, K, relating the analyte signal (SA) and the standard signal (SIS) to their respective concentrations (CA and CIS). Ca, ppm V, ppm SCa, arb. units SV, arb. units 20.0 10.0 14375.11 14261.02 40.0 10.0 36182.15 17997.10 60.0 10.0 39275.74 12988.01 80.0 10.0 57530.75 14268.54 100.0…

Answer 1

Question

Chapter 8, Problem 90IL

(a)

Interpretation Introduction

Interpretation:

The molecule, methylacetamide is polar or not has to be identified.

Concept Introduction:

The unequal distribution of shared electrons caused by differences in electronegativity between bonded atoms is called bond polarity.

A molecule is non-polar, if the charge distribution is symmetric and a molecule is polar if the charge distribution is asymmetric.

I a molecule us symmetric in shape it is said to be non-polar. If a molecule is not regular, it is said to be polar.

(b)

Interpretation Introduction

Interpretation:

The expected position of positive and negative charges in methylacetamide has to be predicted and also identify whether the electrostatic potential surface confirm the prediction.

Concept Introduction:

Electrostatic potential surface or maps are known as molecular electrical potential surfaces, that illustrates the charge distributions of molecules three dimensionally.

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