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Lapatulllka [165]
3 years ago
8

Why are a molecule's atoms as far away from each other as they can get?

Chemistry
1 answer:
Olenka [21]3 years ago
6 0

Answer: A

Explanation:

Because I just answered it and it’s right. ( Forces between electron pairs push the atoms apart.

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1. A calorimeter contains 143 g of water at 22.5°C. A 12 g sample of NaCl is added to the water in the calorimeter. After the so
klio [65]

Answer:

Enthalpy of solution is 583.67 J

Explanation:

The mass of water is 143 g

The mass of NaCl added = 12g

Total mass of solution will be = massofwater+massofNaCl=143+12=155g

The specific heat of solution = specific heat of water = 4.184 J /g °C

The initial temperature = 22.5°C

Final temperature =21.6°

The change in temperature = Initial-Final=22.5^{0}-21.6^{0}=0.9^{0}

The enthalpy of solution will be equal to the heat change in the solution.

The heat change of solution will be calculated as:

Heat=massofsolutionXspecificheatXchangeintemperature

Heat=155x4.184X0.9=583.67J

Thus the enthalpy of solution is 583.67 J (Endothermic reaction)

3 0
4 years ago
CICLOS BIOGEOQUIMICOS: lugares en que encontramos el elemento del ciclo separando en bioticos y abioticos
scoundrel [369]

Answer:

Los ciclos biogeoquímicos son definidos como la circulación de los elementos químicos entre organismos biológicos (es decir, el factor biótico del ciclo), y componentes geológicos inorgánicos del sistema (factores abióticos). En el ciclo del agua, por ejemplo, este elemento se encuentra esparcido en los ríos y arroyos, como así también en la atmósfera, desde donde fluye como lluvia hasta el suelo y puede ser ingerida por organismos vivos terrestres y es utilizada para llevar a cabo diversas funciones celulares.

Explanation:  

Los ciclos biogeoquímicos establecen un vinculo entre los factores bióticos y abióticos del ecosistema, de modo que la energía puede fluir libremente a través de ambas partes del sistema. Los seres vivos necesitan diferentes elementos químicos para sobrevivir, los cuales forma parte de los ciclos biogeoquímicos. En los ciclos biogeoquímicos los elementos se conocen como 'nutrientes' (micro y macronutrientes). Estos elementos se encuentran esparcidos tanto en la corteza de la tierra como en la biósfera. Los nutrientes son indispensables porque de ellos depende de que la energía fluya entre el componente inorgánico y orgánico del ciclo. Por otra parte, los nutrientes también circulan dentro del ciclo entre componentes bióticos de la cadena trófica, con lo cual no sólo los nutrientes sino también la energía fluye entre organismos, desde aquellos más basales en el sistema tales como plantas (ecosistemas terrestres) o algas (marinos), hasta los niveles superiores representados por especies animales hervívoras y carnívoras de tales ecosistemas.

3 0
3 years ago
What is the name C2H4
vodka [1.7K]

Ethylene, also named ethene.

Explanation:

<em>Is this the answer you're looking for?</em>

6 0
3 years ago
Read 2 more answers
Give types of salts and one example each<br>​
Dmitry_Shevchenko [17]

Answer:

sodium chloride

Explanation:

table salt

sea salt

koshea salt

5 0
3 years ago
On the basis of molecular structure and bond polarity, which of the following compounds is most likely to have the greatest solu
Drupady [299]

Answer:

\boxed{\text{c) NH$_{3}$; hydrogen bonding}}

Explanation:

For each of these molecules, you must determine their VSEPR structure and then identify the strongest intermolecular forces.

Remember that water is a highly polar molecule.

a) CH₄

  Electron geometry: tetrahedral

Molecular geometry: tetrahedral

          Bond polarity: C-H bond nonpolar

  Molecular polarity: nonpolar

        Strongest IMF: London dispersion forces

 Solubility in water: low

A nonpolar molecule is insoluble in a polar solvent.

b) CCl₄

  Electron geometry: tetrahedral

Molecular geometry: tetrahedral

          Bond polarity: C-Cl bond nonpolar

  Molecular polarity: nonpolar (symmetrical molecule. All bond dipoles cancel)

        Strongest IMF: London dispersion forces

 Solubility in water: low

A nonpolar molecule is insoluble in a polar solvent.

d) PH₃

  Electron geometry: tetrahedral

Molecular geometry: trigonal pyramidal

          Bond polarity: P-H bonds are polar

  Molecular polarity: polar (all P-H bond dipoles point towards P)

         Strongest IMF: dipole-dipole

  Solubility in water: soluble

A polar molecule is soluble in a polar solvent.

c) NH₃

  Electron geometry: tetrahedral

Molecular geometry: trigonal pyramidal

          Bond polarity: N-H bonds are highly polar

  Molecular polarity:  highly polar (all N-H bond dipoles point towards N)

         Strongest IMF: hydrogen bonding

  Solubility in water: highly soluble

NH₃ is so polar that it can form hydrogen bonds with water.

\boxed{\textbf{The compound with the greatest solubility in water is NH$_{3}$}}

8 0
3 years ago
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