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Ainat [17]
3 years ago
9

A full bottle of water was left outside overnight in freezing temperatures, causing the bottle to crack. No mass was added or re

moved from the bottle. Which property of water caused the crack? A. Solid water is more cohesive than liquid water. B. Solid water has lower surface tension than liquid water. C. Solid water is less dense than liquid water. D. Solid water is less adhesive than liquid water.
Chemistry
1 answer:
kodGreya [7K]3 years ago
6 0

Answer:The correct answer is option C.

Explanation;

Water has unique property that is, it expands on freezing.Which is the reason for less density of ice than water. The cracking of the bottle was due to the expansion of water (present inside the bottle) on freezing.

Generally, density is inversely proportional to the volume of the substance.

Density=\frac{Mass}{Volume}

Density\propto \frac{1}{Volume}

As we know ,that water expands on freezing which means that volume increases. And with increase in volume of density decreases.

Hence, the correct answer is option C.

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3 years ago
In an isothermal gas chromatography experiment using an ECD detector, 1.69 nmols of nchlorohexane, C6H13Cl, was added as an inte
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Answer:

The amount of Chlorodecane in the unknown is 0.105nmols

Explanation:

a) Since the GC is in an isothermal state, Chlorohexane C6H13Cl (1.69 nmols) because of its lower boiling point will elute first and Chlorodecane C12H21Cl will elute second.

The area of the first peak corresponding to Chlorohexane is 32434 units.

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Since the response factor of the compound is not given in question and considering the response factor is same for both the compounds, the answer will be as follow:

1.69 nmols of Chlorohexane gives 32434 units

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By cross multiplication;

Moles of Chlorodecane = 2022*1.69/32434

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