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nadya68 [22]
3 years ago
8

Air is made of seperate molecules of Oxygen, Nitrogen, and Carbon Dioxide. Is the air a pure substance or a mixture? Explain.

Chemistry
1 answer:
Ivan3 years ago
5 0

Air must be a mixture because it consists of at least three separate substances.

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Determine what kind of diet this animal has by examining its teeth.
Marysya12 [62]

Answer:

That animal is a Carnivore.

Explanation:

The skull is that of a Panther which is a carnivore. Hope this helps

6 0
2 years ago
What is the pressure in a 27.0-L cylinder filled with 44.9 g of oxygen gas at a temperature of 315 KK
steposvetlana [31]

Answer:

1.343 atm

Explanation:

We are given the following;

Pressure, p = ?

Volume v = 27 L

Mass of oxygen = 44.9 g

Temperature, T = 315 K

The formular relating all these variables is the equation;

PV = nRT

where R = gas constant = 0.08206 L atm / mole K

To obtain n, we use;

number of moles, n = Mass /  molar mass =  44.9 / 32 = 1.403 moles

From the ideal gas equation;

P = nRT / V

P = 1.403 * 0.08206 * 315 / 27

P = 36.27 / 27 = 1.343 atm

6 0
3 years ago
the concept of __________ is required for certain molecules because the localized electron model assumes electrons are located b
seropon [69]
The concept of resonance is required for certain molecules because the localized electron model assumes electrons are located between a given pair of atoms in a molecule.
7 0
2 years ago
Please help me with this science
MAVERICK [17]

The answer is no. <u>5 grams are equal to 5 milligrams</u>.

"Milli" means million so a <u>milli</u>gram is one-<u>milli</u>onth of a gram.

6 0
4 years ago
Consider the words or phrases below and drop them in the bucket that you would most associate with the word or phrase in the the
Dimas [21]

Answer:

1) non equilibrium

mass movement

unsaturated solution

2)equilibrium phase change

Heat of vaporization

condensation

heat of fusion

normal boiling point

vapor pressure

3) equilibrium reaction

saturated solution

Ksp

solubility

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Explanation:

Nonequilibrium processes are those processes that are irreversible. They often lead to an increase in entropy of the system.

In chemical systems, a state of equilibrium is said to have been attained when the rate of the forward process equals the rate of the reverse process. This is true for both chemical reaction and phase changes. A state of equilibrium connotes a constancy in physical properties of a system over a period of time.

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3 years ago
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