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natita [175]
3 years ago
7

What is the SI Unit used to measure the temperature of a substance?

Chemistry
2 answers:
Marizza181 [45]3 years ago
6 0

Answer: The correct answer is Kelvin

Explanation:

Temperature of the substance is defined as the intensity of heat that a substance contains. It may also be defined as the degree of hotness or coldness.

S.I. unit stands for standard international unit.

Temperature is measured in various units such as Degree Celsius, Degree Fahrenheit and Degree kelvin.

The S.I. unit of temperature is Degree Kelvin.

Gram is the S.I. unit of Mass of the substance.

Mole is the S.I. unit of amount of substance.

ser-zykov [4K]3 years ago
5 0

Answer:

kelvin

Explanation:

google

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Write the atomic symbols for isotopes with the following characteristics? 1)an oxygen atom with 10 neutrons 2)a neon atom with t
VARVARA [1.3K]
Isotopes are elements that differ in the number in neutrons while the numner of protons are the same. The answers of the questions are: 1) 18/8 O 2) 22/10 Ne 3) 53/25 Mn 4) 37/24 Cr 5) 106/81 Ti.
8 0
3 years ago
I just need help on c-g. The whole question is there in case anyone needs it.
Elza [17]

Answer:

(c) 0.11; (d) -24.5 kJ·mol⁻¹; (e) See below; (f) Kc increases;

(g) No effect on ΔH

Step-by-step explanation:

(c) Kc at 125 °C  

In Part (a) one molecule of XY dissociated into one X and one Y.

       XY ⇌ X + Y

I:      10       0    0

C:     -1       +1   +1

E:      9        1     1

Kc = {[X][Y]}/[XY] = (1 × 1)/9 = ⅑ = 0.11

(d) ΔH

ΔH is a constant that is characteristic of the reaction.

ΔH = -24.5 kJ·mol⁻¹

(e) Effect of temperature on concentrations

If ΔH is negative, the reaction is exothermic.

Heat is a product of the reaction, so we can write the equation as

XY ⇌ X + Y + heat

If we lower the temperature, we are removing heat from the system.

<em>Le Châtelier's Principle</em> states that if you apply a stress to a system at equilibrium, it will respond by trying to relieve the stress.

We applied a stress by removing heat, so the system responds by producing more heat. The position of equilibrium moves to the right, and <em>more products will form</em>.

The diagram might look like the one below.

(f) Effect of temperature on Kc

Kc = [Products]/[Reactants]

We are increasing [Products] and decreasing [Reactants].

If you increase the numerator and decrease the denominator, you i<em>ncrease</em> the value of the quotient.

The value of the equilibrium constant increases when the temperature decreases.

(g) Effect of temperature on ΔH

Decreasing the temperature has no effect on ΔH, because the enthalpies of the reactants and products are properties of the substances themselves. They do not depend on the temperature.

7 0
3 years ago
What type of reaction is the following chemical reaction? SeO2 + 3Cl2 -&gt; SeCl6 + O2​
dem82 [27]

Answer:

This is a synthesis reaction.

Explanation:

This is because nothing is being swapped out, reactants are being combined and then form a product.

4 0
3 years ago
PLZ HELP THIS IS DUE IN 2 MINS!!!!!!
antoniya [11.8K]

Answer:

8. 3.333333n per minute

9. you

Explanation:

8. Divide 50 by 15 and you get 3.333333.

9. 100 divided by 15 is 6.66666. 100 divided by 14 is 7.14.

So you did more work.

5 0
3 years ago
A sample of Xe takes 75 seconds to effuse out of a container. An unknown gas takes 60 seconds to effuse out of the identical con
miss Akunina [59]

Answer:

Kr

Explanation:

Now we have to apply Graham's law of diffusion in gases

t1/t2 = √M1/M2

If t1 is the time of diffusion of Xe = 75 seconds

t2 is the time of diffusion of the unknown gas = 60 seconds

M1= molar mass of Xe=131.293

M2= molar mass of the unknown gas

Thus;

75/60 = √131.293/M2

(75/60)^2= (√131.293/M2)^2

5625/3600=131.293/M2

M2= 3600×131.293/5625

M2= 84.0

The unknown gas is krypton (Kr)

8 0
3 years ago
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