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dmitriy555 [2]
3 years ago
14

Density is _____ to pressure.

Chemistry
2 answers:
In-s [12.5K]3 years ago
8 0
C. not related
density is lower.
irinina [24]3 years ago
6 0

The answer is A. Directly Proportional :)

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What are the advantages of using Fahrenheit ?
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Answer:

You can better relate to the air temperature.

Explanation:

Fahrenheit gives you almost double the precision of Celsius without having to use decimals.

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2 years ago
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4). One mole of monoclinic sulfur at 25C was placed in a constant-pressure calorimeter whose heat capacity (C) was 1620 J/K. T
andre [41]

<u>Answer:</u> The enthalpy change of the reaction is -243 J/mol

<u>Explanation:</u>

The heat released by the reaction is absorbed by the calorimeter and the solution.

The chemical equation used to calculate the heat released follows:

q=c\times \Delta T

where,

c = heat capacity of calorimeter = 1620 J/K

\Delta T = change in temperature = 0.150^oC=0.150K   (Change remains same)

Putting values in above equation, we get:

q=1620J/K\times 0.15K=243J

<u>Sign convention of heat:</u>

When heat is absorbed, the sign of heat is taken to be positive and when heat is released, the sign of heat is taken to be negative.

For the given chemical reaction:

S\text{ (monoclinic)}\rightarrow S\text{ (orthorhombic)}

We are given:

Moles of monoclinic sulfur = 1 mole

  • To calculate the enthalpy change of the reaction, we use the equation:

\Delta H_{rxn}=\frac{q}{n}

where,  

q = amount of heat released = -243 J

n = number of moles = 1 mole

\Delta H_{rxn} = enthalpy change of the reaction

Putting values in above equation, we get:

\Delta H_{rxn}=\frac{-243J}{1mol}=-243J/mol

Hence, the enthalpy change of the reaction is -243 J/mol

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3 years ago
How many moles are there in 111.7 g of Fe?
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2

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111.7

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What element decreases its oxidation number in this reaction
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Where’s the reaction?

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