The Two Most Abundant Isotopes of Boron Are ¹⁰B and ¹¹B

question 118

Multiple Choice

The two most abundant isotopes of boron are ¹⁰B and ¹¹B, with ¹¹B being about 4 times more abundant. In the mass spectrum of trimethylborate [(CH₃O) ₃B], ________.

• A) the peaks at m/z 103 and m/z 104 have equivalent intensities
• B) the peak at m/z 103 has an intensity which is 4 times that of the m/z 104 peak
• C) the peak at m/z 103 has an intensity which is 1/4 the intensity of the peak at m/z 104
• D) none of the above

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Definitions:

Quantity Demand

The total amount of a product or service that consumers are willing to purchase at a given price over a specified period.

Monopolistic Competition

A market structure combining elements of monopoly and competitive markets, where many sellers offer slightly differentiated products.

Differentiated Products

Goods or services that are distinguished from others in the market by unique features, quality, or brand.

Pure Competition

Occurs when different companies sell commodity products that consumers perceive as substitutable; price usually is set according to the laws of supply and demand.