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4 years ago

Which statement explains how this type of fossil differs from a trace fossil?

Chemistry

2 answers:

KatRina [158]4 years ago

7 0

The answer is:

This fossil was an organism that has been turned into rock.

glad to help!

Nadya [2.5K]4 years ago

6 0

Answer:

D) This fossil was an organism that has been turned into rock

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What is the heat of vaporization of ethanol, given that ethanol has a normal boiling point of 63.5°C and the vapor pressure of e

Serjik [45]

Explanation:

According to Clausius-Claperyon equation,

$ln (\frac{P_{2}}{P_{1}}) = \frac{-\text{heat of vaporization}}{R} \times [\frac{1}{T_{2}} - \frac{1}{T_{1}}]$

The given data is as follows.

$T_{1} = 63.5^{o}C$ = (63.5 + 273) K

= 336.6 K

$T_{2} = 78^{o}C$ = (78 + 273) K

= 351 K

$P_{1}$ = 1 atm, $P_{2}$ = ?

Putting the given values into the above equation as follows.

$ln (\frac{P_{2}}{P_{1}}) = \frac{-\text{heat of vaporization}}{R} \times [\frac{1}{T_{2}} - \frac{1}{T_{1}}]$

$ln (\frac{1.75 atm}{1 atm}) = \frac{-\text{heat of vaporization}}{8.314 J/mol K} \times [\frac{1}{351 K} - \frac{1}{336.6 K}]$

$\Delta H$ = $\frac{0.559}{1.466 \times 10^{-4}} J/mol$

= $0.38131 \times 10^{4} J/mol$

= 3813.1 J/mol

Thus, we can conclude that the heat of vaporization of ethanol is 3813.1 J/mol.

4 0

4 years ago

Static electricity is the buildup of electric charges in

Sauron [17]

Static electricity is the buildup of electric charges on surface of an object.
static electrical charges remain on the surface of the object until they bleed off to the ground or until they get quickly neutralised by a discharge.

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4 years ago

Is air pollution a chemical change?

Evgesh-ka [11]

Answer: many of the chemicals found in urban air are formed by chemical reactions driven by sunlight.

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3 years ago

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How does the mass of the water compare to the mass of the ice?

snow_lady [41]

The mass of water is the same as the mass of ice

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3 years ago

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How do you balance this?

ad-work [718]

Weigh them both and there you go

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3 years ago