Charge on one mol of electron is approximately equal to

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#Question id: 56

#Section C (Domain-Specific Knowledge)

Trace elements are those required by an organism in only minute quantities. Which of the following is a trace element that is required by humans and other vertebrates, but not by other organisms such as bacteria or plants?

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#Question id: 57

#Section C (Domain-Specific Knowledge)

A(n) ________ has charge but negligible mass, whereas a(n) ________ has mass but no charge.

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#Question id: 58

#Section C (Domain-Specific Knowledge)

A covalent chemical bond is one in which ________.

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#Question id: 59

#Section C (Domain-Specific Knowledge)

Nitrogen (N) normally forms three covalent bonds with a valence of five. However, ammonium has four covalent bonds, each to a different hydrogen (H) atom (H has a valence of one). What do you predict to be the charge on ammonium?

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#Question id: 60

#Section C (Domain-Specific Knowledge)

Which of the following is true for the reaction?

3H₂ + N₂   2NH₃

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#Question id: 61

#Section C (Domain-Specific Knowledge)

Which of the following correctly describes chemical equilibrium?