Structure and BondingCyanamide, NH2CN, has a melting point of 45 °C.(a) Draw a dot-and-cross diagram to illustrate the electron arrangement in NH2CN.(b) Name the predominant intermolecular interaction that could account for the meltingpoint of cyanamide, and illustrate your answer with a diagram.(a) The melting point of NaCl was found to be 801 °C. Suggest, with reasons, whetherthe melting point of MgO will be higher or lower than that of NaCl.3(Refer to Section 1.2.2, pg 4 of Topic 3 Lecture Notes to revise how to compare ionic bond strength)(b) The boiling points of ammonia, carbon monoxide and carbon dioxide are given inthe table below:gasformulaMrb.p. /°CammoniaNH317-33carbon monoxideCO28-192carbon dioxideCO244-78With reference to their structure and bonding, account for their boiling points.(Refer to Section 5, pg 22 of Topic 3 Lecture Notes to revise how to identify the type of IMF)

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Cyanamide, NH2CN, has a melting point of 45 °C. (a) Draw a dot-and-cross diagram to illustrate the electron arrangement in NH2CN. (b) Name the predominant intermolecular interaction that could account for the melting point of cyanamide, and illustrate your answer with a diagram.

Cyanamide, NH2CN, has a melting point of 45 °C. (a) Draw a dot-and-cross diagram to illustrate the electron arrangement in NH2CN. (b) Name the predominant intermolecular interaction that could account for the melting point of cyanamide, and illustrate your answer with a diagram.

Chemistry

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Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

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Question

Structure and Bonding
Cyanamide, NH2CN, has a melting point of 45 °C.
(a) Draw a dot-and-cross diagram to illustrate the electron arrangement in NH2CN.
(b) Name the predominant intermolecular interaction that could account for the melting
point of cyanamide, and illustrate your answer with a diagram.
(a) The melting point of NaCl was found to be 801 °C. Suggest, with reasons, whether
the melting point of MgO will be higher or lower than that of NaCl.
3
(Refer to Section 1.2.2, pg 4 of Topic 3 Lecture Notes to revise how to compare ionic bond strength)
(b) The boiling points of ammonia, carbon monoxide and carbon dioxide are given in
the table below:
gas
formula
Mr
b.p. /°C
ammonia
NH3
17
-33
carbon monoxide
CO
28
-192
carbon dioxide
CO2
44
-78
With reference to their structure and bonding, account for their boiling points.
(Refer to Section 5, pg 22 of Topic 3 Lecture Notes to revise how to identify the type of IMF)

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