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sergiy2304 [10]
3 years ago
7

I’m 1992 which city was named the most polluted

Chemistry
2 answers:
Arada [10]3 years ago
7 0

Answer:

Mexico City as the most polluted city in the world in 1992

Explanation:

Elden [556K]3 years ago
6 0

Answer:

Mexico City

Explanation:

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Consute a tabela periódica e identifique o elemento químico ao qual corresponde cada item:
VMariaS [17]

Answer:

a

Explanation:

7 0
3 years ago
For each solute, identify the better solvent: water or carbon tetrachloride
Rom4ik [11]

The better solvent for Na₂S (Natrium sulfide)and CH₃OH(methanol): water

The better solvent for C₆H₆(benzene) and Br₂(bromine) : CCl₄

<h3>Further explanation</h3>

In covalent bonds there are differences in electronegativity which causes polarization of the bonds

If the bond in an electron pair is more attracted to one atom, then the covalent bond is polar

This is due to the electron attraction of one atom which is bigger than the other atoms

But the geometrical shape of molecules can make molecules that have polar bonds can be polar or non-polar

The symmetrical shape of the molecule is usually a non-polar molecule

For example on H₂O

This molecule is polar because of the difference in electronegativity where the O atom has a stronger electron attraction when compared to the H atom, so this molecule have positive and negative poles where the negative pole is on the O atom

Polar molecules dissolved in water undergo ionization so they can conduct electricity and are electrolyte,  while non-polar molecules are non-electrolyte.

<em>Polar molecules will dissolve polar molecules and vice versa non-polar molecules can dissolve non-polar molecules. </em>

So water molecules that can be used to test polar and non-polar molecules by dissolving them in water

The size of polarity is usually indicated by the magnitude of the dipole moment

The greater the dipole moment, the more polar the compound is. In non-polar compounds the dipole moment is zero.

water- H₂O is a polar solvent, due to the large electronegativity between O and H atoms, and the shape of the V molecule (asymmetrical)

CCl₄- Carbon tetrachloride is a nonpolar solvent, where C atoms as central and Cl atoms have different electronegativity but because of the symmetrical shape so that the dipole moment is removed and so it is nonpolar

Let see that each of these compounds is polar or non-polar

Na₂S (Natrium sulfide)and CH₃OH(methanol) are ion compounds that can dissolve in polar solvents such as water

C₆H₆(benzene) and Br₂(bromine) are non-polar covalent compounds with symmetrical shapes and do not have free electron pairs that can dissolve in CCl₄

<h3 /><h3>Learn more</h3>

ionic bonding

brainly.com/question/1603987

type of chemical bond

brainly.com/question/5008811

Lewis structures

brainly.com/question/6085185

Keywords : chemical bond, covalen bond, water, electrons, dipole moment

<h3 />

4 0
3 years ago
Read 2 more answers
In which pair do the particles have approximately the same mass?
vlada-n [284]
The answer is (2). Both the proton and the neutron have masses around 1amu.
7 0
4 years ago
Which chemical equation represents a precipitation reaction?
GrogVix [38]

Answer:

See the answer below, please.

Explanation:

A precipitation reaction is defined as one that yields an insoluble compound (precipitate) as a product by mixing two different solutions. An example:

NaCl + AgN03 -> Agcl (precipitate) + NaN03

8 0
4 years ago
Please Help! I just started balancing equations and my teacher gave me this. Thanks in advance! :D
Alenkasestr [34]
So you need to put numbers before each compound to make sure there are the exact same number of elements on each side. If you put a 4 before NH4 there are 4 Nitrogen and now 16 hydrogen. I just played around with numbers and guessed until I got them even.
8 0
3 years ago
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