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Alex Ar [27]
2 years ago
9

Pleaseee helppp!!!!!

Chemistry
2 answers:
IgorC [24]2 years ago
5 0

Answer:

it releases energy that is used for power

Explanation:

olya-2409 [2.1K]2 years ago
4 0

Answer: It releases energy that is used for power.

Explanation: https://www.investopedia.com/terms/h/hydrocarbon.asp

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A certain liquid has a normal boiling point of and a boiling point elevation constant . A solution is prepared by dissolving som
Andrews [41]

The given question is incomplete. The complete question is as follows.

A certain liquid has a normal boiling point of 124.2^{o}C and a boiling point elevation constant k_{b} = 0.62 ^{o}C kg mol^{-1}. A solution is prepared by dissolving some sodium chloride (NaCl) in 6.50 g of X. This solution boils at 127.4^{o}C. Calculate the mass of NaCl that was dissolved. Round your answer to significant digits.

Explanation:

As per the colligative property, the elevation in boiling point will be as follows.

     

T = boiling point of the solution =

T_{o} = boiling point of the pure solvent = 124.2^{o}C

K_{b} = elevation of boiling constant = 0.62 ^{o}C kg mol^{-1}

We will calculate the molality as follows.

     molality = \frac{\text{maas of solute}}{\text{molar mass of solute}} \times \frac{1000}{\text{mass of solvent in g}}

i = vant hoff's factor

As NaCl is soluble in water and dissociates into sodium and chlorine ions so i = 2.

Putting the given values into the above formula as follows.  

    T - T_{o} = i \times K_{b} \times \text{molality of solution}

  (127.4 - 124.2)^{o}C = 2 \times 0.62 \times \frac{m}{60} \times \frac{1000}{650}

                  m = 100 g

Therefore, we can conclude that 100 g of NaCl was dissolved.

3 0
3 years ago
When an exothermic reaction occurs in a water solution, the temperature of the solution
iVinArrow [24]

Answer:

is hot

Explanation:

6 0
3 years ago
Read 2 more answers
If a substance has a large mass and a small volume how dense is it
Over [174]

Answer:

Very dense.

Explanation:

Conceptually, you are taking a large amount of atoms and putting them into a small container.  This means the spaces between atoms has to be smaller and the substance is more dense. (see image)

Mathematically, the equation for density is mass divided by volume (Density=\frac{m}{v} ). If you divide a big number by a small number, you still have  a pretty big number (ex 4/2=2 versus 6/1=6)

4 0
3 years ago
Charged atoms are called as _____. protons electrons ions
Volgvan

Answer: Hello brainly stundents, The answer for this question is A charged Atom is actually called an ion, this charge occurs due to the indifference of electrons that are found outside the main nucleus of the atom

Explanation:

6 0
3 years ago
Which equilibrium describes a reversible reaction a short time after starting the reaction with reactants only?
lisabon 2012 [21]

The right answer is N2(g) + 3H2(g) => 2NH3(g).

Ammonia (NH3) is produced by the synthesis of nitrogen (N2) and hydrogen (H2):

N2 + 3 H2 → 2 NH3

During the first half of the 20th century, the NH3-green was produced without CO2 emission at

from hydroelectricity, water, and atmospheric air.

H2 came from the electrolysis of water, the N2 of atmospheric air.

6 0
3 years ago
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