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4 years ago

Choose the incorrect answer below concerning absolute zero.

Chemistry

2 answers:

Stells [14]4 years ago

8 0

Absolute zero is zero K (Kelvin) that is the complete absence of any molecular movement.

babymother [125]4 years ago

6 0

Answer:

. is equal to 0°C ( notice that the question is which statement is inocrrect)

Explanation:

The absolute zero corresponds to the zero of the absolute temperature scale, whose unit of measure is the Kelvin degree, (abbreviated K grade, in honor of the physicist Lord Kelvin), and its value coincides with a temperature of 273.15 ° C below zero (or −273.15 ° C) on the most daily scale of degrees Celsius or Celsius. Budini also clarified that a temperature difference of one degree Celsius is the same as a temperature difference of one degree Kelvin-

"We call absolute zero of temperature the value for which the internal movement of the atoms or molecules that constitute matter ceases. Temperature is a measure of the energy of motion of the microscopic constituents of a physical system. Therefore, one can to think that if it is possible to lower the temperature of a system then it should be possible to reach a (zero) temperature value for which there is no internal movement of its constituents. It would be a kind of frozen state of any material or system"

This means that no matter what substance, material or system is spoken of, such a system cooled to absolute temperature zero will have all its motionless constituent particles, there will be no internal energy of motion.

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What best explains the formula unit for a compound made from fluorine and hydrogen?

kirza4 [7]

Answer:

2)HF bcz both fluorine and hydrogen are capable of forming only one covalent bond

Explanation:

flourine is short one electron to become stable while hydrogen has only one electron.Hydrogen cant give out its one electron fully thus it will share its one electron with flourine

4 0

3 years ago

Apply the given electronegativities to each bond in the examples below to see which are polar and which are nonpolar. Multiple b

Nesterboy [21]

Answer:

H-O-H polar

O-C-O nonpolar

H-C-N polar

Explanation:

Looking up the electronegativities of the atoms involved in this question, we have:

Atom Electronegativity

H 2.2

C 2.55

N 3.04

O 3.44

All of the atoms differ in electronegativity resulting in individual dipole moments in H-O, O-C, H-C and C-N bonds. To find if the molecules will be polar we need to consider the structure of the compound to see if there is a resultant dipole moment.

In H-O-H, we have 2 lone pairs of electrons around the central oxygen atom which push the angle H-O-H of the ideal tetrahedral structure to be smaller than 109.5 º resulting in an overall dipole moment making it polar.

In O-C-O, we have two dipole moments that exactly cancel each other in the linear molecule since the central carbon atom does not have lone pairs of electrons since it has 2 double bonds. Therefore the molecule is nonpolar.

In H-C-N, again we have have a central carbon atom without lone pairs of electrons and the shape of the molecule is linear. But, now we have that the dipole moment in C-N is stronger than the H-C dipole because of the difference in electronegativity of nitrogen compared to hydrogen. The molecule has an overall dipole moment and it is polar.

8 0

3 years ago

Read 2 more answers

Aton Van Leeuwenhoek was the first scientist to discover prokaryotic organisms. These single-celled organisms lack a nucleus and

yaroslaw [1]

Answer: a

Explanation:

4 0

3 years ago

Nitric oxide, an important pollutant in air, is formed from the elements nitrogen and oxygen at high temperatures, such as those

Elden [556K]

Answer:

The Equilibrium will shift towards the left.

Explanation:

The reaction for the formation of nitric oxide is follows,

$N_2(g)+O_2(g)\leftrightarrow2NO(g)$

Expression for reaction quotient is as follows,

$Q=\frac{[NO]^2}{[N_2][O_2]}$

Putting the values according to the data given and calculating reaction quotient for the reaction

$Q=0.16$

So, the reaction quotient is 0.16.

and the value of K is 0.01 .

Q>K

Since the value of K is less than Q, therefore the reaction will shift towards left.

5 0

3 years ago

How do i calculate the concentration of a certain solution

Nuetrik [128]

Answer:

Divide the mass of the solute by the total volume of the solution. Write out the equation C = m/V, where m is the mass of the solute and V is the total volume of the solution. Plug in the values you found for the mass and volume, and divide them to find the concentration of your solution.

3 0

3 years ago