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mote1985 [20]
3 years ago
13

Which trait enables a polar bear to survive an extremely cold climate.

Chemistry
2 answers:
blondinia [14]3 years ago
8 0
Thick fur helps a polar bear survive
Alex Ar [27]3 years ago
4 0

Answer: Option (c) is the correct answer.

Explanation:

Polar bear has two layers of fur and a thick layer of fat called blubber. These layers help a polar bear to maintain warmth in his body.

These layers keep the temperature of polar bear about 37 ^{o}C.

Therefore, we can conclude that out of the given options, thick fur is the trait which enables a polar bear to survive in an extremely cold climate.

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14
Bond [772]

Answer:

Explanation:

The melting point of a substance is the temperature at which its melt. The state of a substance is dependent on it's melting temperature. Generally, melting point above 25 °C is a solid.

This means phenol is a solid

Duodecane has melting point below 25 °C hence it is either a liquid or gas. However its boiling point of 216 °C means it would require higher temperature to boil it. Since 25 °C is less than 216 °C it means that it would remain in the liquid state.

Methane has melting point below 25 °C hence it is either a liquid or gas. However its boiling point of -164 °C means it boils easily even at very low temperatures. Since 25 °C is greater than -164 °C it means that it would exist in the gaseous state

8 0
3 years ago
22.00 g of CO2 has a volume of 50.00 L and a pressure of 0.8210 atm. What must be the
creativ13 [48]

Answer:

T = 9.875K

Explanation:

The ideal gas Law is PV = nRT.

P = Pressure

V = Volume

n = amount of substance

R =  8.314 J/(K. mol)

T = Temperature in Kelvin

22g CO2

CO2 Molar Mass = 44g/mol

C = 12g/mol

O = 16g/mol

P = 0.8210atm

V = 50L

PV = nRT

0.8210 x 50 = 8.314 x 0.5 x T

41.05 =  4.157T

T = 41.05/4.157

T = 9.875K

3 0
3 years ago
What is concentration​
solmaris [256]

Answer:

In chemistry, "concentrated" refers to a relatively large quantity of substance present in a unit amount of a mixture. Usually, this means there is a lot of ​a solute dissolved in a given solvent. A concentrated solution contains the maximum amount of solute that can be dissolved.

Explanation:

5 0
3 years ago
The__ model assigns to fixed orbits of defined energy. To move between orbits, electrons must emit or absorb _____ radiation
AURORKA [14]

Answer:

The Bohr model assigns to fixed orbits of defined energy. To move between orbits, electrons must emit or absorb electromagnetic radiation

Explanation:

In the Bohr model of the atom, the atom itself looks like a solar system.

In fact, at the center of the atom we have the nucleus, which contains protons and neutrons.

Around the nucleus, at a much higher distance, we have the electrons, negatively charged. The electrons move around the nucleus in fixed orbits, like the planets around the Sun.

According to Bohr's model, the electrons  cannot live in the space between two orbits, but they must stay in one of these orbits. Each of these orbits is associated to a certain energy level: therefore, this means that the energies of the electrons in an atom are quantized, so they cannot take all possible values, but only some precise values.

Moreover, according to the law of conservation of energy:

- When an electron jumps from a lower energy level to a higher energy level, it must absorbs energy, and this energy is absorbed in the form of electromagnetic radiation (a photon) whose energy is equal to the difference in energy between the two levels

- SImilarly, when an electron jumps from a higher energy level to a lower energy level, it releases energy, in the  form of electromagnetic radiation (a photon) whose energy is equal to the difference in energy between the two levels.

4 0
3 years ago
There are 13 instances on the periodic table where the atomic mass does not increase along with atomic number. For each of these
Aneli [31]

Answer:

i don't know the answer right now

8 0
2 years ago
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