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3 years ago

How many moles of propane (C3H8) are in a 7.00-L tank at 20.0°C and 5.45 atm of pressure?

1 answer:

7 0

By the claperyron equation<span>:

T = 20.0ºC + 273.15 => 293.15 K

R = 0.082 atm

Therefore:

P x V = n x R x T

5.45 x 7.00 = n x 0.082 x 293.15

38.15 = n x 24.0383

n = 38.15 / 24.0383

n = 1.587 moles of C3H8

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What is another name for the acid dissociation constant?

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A. Ionization constant

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3 years ago

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Facts about heat absorption<br>and simple questions about heat absorption with answer

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<span>As heat energy reaches an object it can be absorbed in a similar manner to the way sponges absorb water. Heat enters an object, warming it. The longer the object is exposed to the heat source, the more heat it absorbs.</span>

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3 years ago

Analyze the diagram showing the changing states of matter. Drag the item from the item bank to its corresponding match.

iVinArrow [24]

The correct matches for changes of state are:

1 or 3 : Arrow that shows particles getting closer together
gas: State of matter that would fill any container
liquid: State of matter with definite volume but NOT shape
2 or 4: Arrow that shows particles gaining energy
solid: State of matter with definite shape

<h3>What is change of state?</h3>

Change of state is the process whereby matter in one physical state is converted to matter in another state by the addition or removal of heat.

The process of change of state are:

Melting: solid to liquid due to addition of heat
Vaporization: liquid to gas due to addition of heat
Sublimation: solid to gas due to addition of heat
Freezing: liquid to solid due to removal of heat
Condensation: gas to liquid due to removal of heat
Deposition: gas to solid due to removal of heat

Considering the given diagram, the correct matches are:

1 or 3 : Arrow that shows particles getting closer together
gas: State of matter that would fill any container
liquid: State of matter with definite volume but NOT shape
2 or 4: Arrow that shows particles gaining energy
solid: State of matter with definite shape

In conclusion, change of state of matter occurs due to heat changes.

Learn more about change of state at: brainly.com/question/1078692

#SPJ1

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1 year ago

2. What is the average height in cm for plants in group 2? * 38 cm 56 cm 97 cm 114 cm

Nina [5.8K]

Answer:

76.25cm

Explanation:

38cm + 56cm +97cm +114cm = 305cm

305cm÷4 = 76.25cm

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3 years ago

Calculate the energy E of a sample of 3.50 mol of ideal oxygen gas (O2) molecules at a temperature of 310 K. Assume that the mol

love history [14]

Answer:

13.53 kJ

Explanation:

The energy of a gas can be calculated by the equation:

E = (3/2)*n*R*T

Where n is the number of moles, R is the gas constant (8.314 J/mol.K), and T is the temperature.

E = (3/2)*3.5*8.314*310

E = 13,531.035 J

E = 13.53 kJ

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3 years ago