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3 years ago

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A crystallographer measures the horizontal spacing between molecules in a crystal. The spacing is 14.8 nm . What is the total wi

dth of a crystal in millimeters 105 molecules across? Write your answer as a decimal.

1 answer:

IrinaK [193]3 years ago

4 0

Answer: 1539.2nm

The space between molecule is going as X-1 function. That mean 1 molecule doesn't have space, 2 molecules have 1 space, 3 molecules have 2 space. Then 105 molecules will be will have 104 space.
Each space is 14.8nm, the total distance would be: 104 space x 14.8 nm/space= 1539.2nm

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Answer:

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Given that, each successive row contains two fewer seats than the preceding row.

Formula:

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$\Rightarrow t = \frac{n}{2}$

Last term l= n, the number of term $=\frac n2$ , First term = 2

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$=\frac{{n}}{4}[2+n}]$

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