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maksim [4K]
3 years ago
12

Calculate the volume of 5.00 mol of helium at 120C and 1520 mm Hg

Chemistry
1 answer:
levacccp [35]3 years ago
4 0

Answer:

80.7 L

Step-by-step explanation:

This looks like a case where we can use the Ideal Gas Law to calculate the volume.

pV = nRT       Divide both sides by p

V = (nRT)/p

=====

Data:

n = 5.00 mol

R = 0.082 06 L·atm·K⁻¹mol⁻¹

T = (120 +273.15) K = 393.15K

p = 1520 mmHg × 1 atm/760 mmHg = 2.00 atm

=====

Calculation:

V = (5.00 × 0.082 06 × 393.15)/2.00

V = 161.3/2.00

V = 80.7 L  

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Answer:
9 (1-2x²)

Explanation:
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The first step is to compute the multiplication. This will give:
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Then, we will add like terms as follows:
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5 0
3 years ago
Ice floats on water. For most other substances, however, the solid sinks in the liquid. Classify each of these statements based
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Answer:

1.High pressure will cause the liquid to become solid :

<u>Describe both water and other substances</u>

2.High pressure will cause the solid to become liquid <u>:</u>

<u>It describe none : neither water nor other substances </u>

<u>This statement is :False for both water and other substances</u>

3.The solid is more dense than the liquid :

It describe other substance

<u>This statement is :False for water but true for other substances.</u>

4. In a phase diagram, the solid-liquid coexistence line has a negative slope.

It describes water:

<u>This statement is :True for water because solid ice is less dense than liquid water.</u>

<u>False for other substance, they have positive slope</u>

5.The molecules are closest in the liquid phase.

<u>This statement is :False for water and other substances </u>

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It Describes water because ice is less dense than liquid water

7. In a phase diagram, the solid-liquid coexistence line has a positive slope.

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<u>Answers to statement 1 , 2,5 and 8</u>

<u>Answers to statement 1 , 2</u>

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In Both for water and other substance

<u>High pressure will cause the liquid to become solid.</u>

<u>Answers to statement 5,8 :</u>

2.The Particles of solid are closely packed hence there is maximum force of attraction between the particle of solid as compared to liquid and gases .

Hence , The molecules <u>of both water and other substance</u>s are closest in the solid phase

This also means that in liquid molecules are far apart .

Rest statement : 3, 4 ,6 ,7 are explained below(see attached image)

<u>The molecules are closest in the liquid phase is false statement  and does not describe both water and other substance</u>

<u>Ice floats on water. For most other substances, however, the solid sinks in the liquid.</u>

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The line DB is  = the solid-liquid coexistence line

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4. the solid-liquid coexistence line has a negative slope.

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3 years ago
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