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KatRina [158]
2 years ago
11

Use the electronegativities in the periodic table above to determine which bonding pair forms polar covalent bonds.

Chemistry
1 answer:
VikaD [51]2 years ago
3 0
image plz i need that to answer question
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An acorn falls from a tree and accelerates at 9.8 m/s2. It hits the ground in 0.67 s. What is the speed of the acorn when it hit
ivolga24 [154]
Acceleration means that while it's falling, its speed will increase by 9.8 m/s
every second.  That's the acceleration of everything that falls near the Earth's
surface, no matter how heavy or light the object is.

In 0.67 seconds, then, the speed of the acorn increases from zero to

                 (0.67 x 9.8) = <u>6.57 m/s</u> .
8 0
3 years ago
How many moles are in 1.00 Kg Fe?
Feliz [49]

Answer:

17.9 Moles

Explanation:

In the one-kilogram iron weight there are 1.08·1025 atoms, which corresponds to the chemical amount of approximately 17.9 moles of atoms

To find the number of moles, determine the molar mass of iron. Then divide the given mass by its molar mass, or multiply the given mass by the reciprocal of the molar mass, which is more common.

4 0
3 years ago
This problem has been solved!
Vanyuwa [196]

Answer:

NaCl and water: Ion - Dipolo forces

NaCl and Hexane: Ion-ion force between Na+ and Cl− ions and London dispersion force between two hexane molecules

Explanation:

<u><em>NaCl and water:</em></u>

The <em>ion-dipole force</em> is established between an ion and a polar molecule.  Polar molecules are dipoles, they have a positive end and a negative end.

H2O has an important charge separation in its atoms (the H has a positive partial charge and the O has a negative partial charge) and this causes permanent electrical dipoles in the water molecules.

Sodium chloride is an ionic compound formed of positive and negative charge ions, Na + and Cl-. Depending on their charge, these ions will be attracted to opposite charges in the water molecules (H attracts chloride ions and O attracts sodium ions), causing the salt to dissolve in water.

<u><em> NaCl and Hexane:</em></u>

The dispersion forces of London occur between apolar molecules, and they occur because when two molecules approach a distortion of the electronic clouds of both originates, generating in them, transient induced dipoles, due to the movement of the electrons, so it allows interact with each other.

Hexane is a non-polar molecule, which are those that have no charge separation within the molecules. Then there is <em>London dispersion force between two hexane molecules. </em>

On the other hand, the <em>ion-ion force</em> is produced between ions of the same or different charge, where ions with charges of opposite sign attract each other and ions with charges of the same sign repel each other. This is the force that occurs <em>between the NaCl ion</em>s.

5 0
3 years ago
____________J/g. Degree C
abruzzese [7]

Answer:

0.417 J/g'C

Explanation:

8 0
3 years ago
How does increasing the temperature of a liquid below the boiling point affect
Vilka [71]
When the particles of a substance (usually a liquid) is heated up, its particles absorb the energy provided thereby increasing their kinetic energy resulting to more movement of the individual particles.
4 0
2 years ago
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