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2 months ago

In general, the presence of atoms of what element(s) makes a molecule polar

1 answer:

3 0

A molecule's polarity is influenced not only by specific atoms but also by its symmetry. For instance, alkanes are typically non-polar due to the absence of a net dipole moment. A dipole moment occurs because of differences in electronegativity between carbon and other elements, commonly oxygen, halogens, and nitrogen, which, due to their high electronegativity, create a net dipole moment and thus polarity.

$H_3C-CH_3$ exhibits symmetry and is therefore non-polar.

$H_3C-O-CH_3$ , being asymmetrical, is polar due to its bent structure influenced by the oxygen's lone pairs.

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a chemist uses hot hydrogen gas to convert chromium (iii) oxide to pure chromium. how many grams of hydrogen are needed to produ

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1 month ago

Kayla owns a food truck that sells tacos and burritos. She sells each taco for $3 and each burrito for $7.25. Yesterday Kayla ma

VMariaS [2998]

They overcomplicated things with lots of words. Your initial equation deals with the revenue. I’ll denote tacos as x and burritos as y.
The first equation would be 3x + 7.25y = 595, given that you already have the prices but need the quantities. The second equation will reflect that double the burritos were sold compared to tacos, expressed as y = x + 2.
Hope this clarifies things. If you need further explanation, I can elaborate more.

6 0

3 months ago

If angle ABE = 2n + 7 and angle EBF=4n-13,<br>find angle ABE.

VMariaS [2998]

Answer:

Angle ABE measures 27°.

Explanation:

Refer to the attached diagram related to this question.

The given values are ∠ABE=2n+7 and ∠EBF=4n-13.

Clearly seen in the diagram, ∠ABE and ∠EBF are equal in measure.

$m\angle ABE=m\angle EBF$

$2n+7=4n-13$

Move variable components to one side of the equation.

$7+13=4n-2n$

$20=2n$

Split both sides by 2.

$10=n$

The solution for n arrives at 10.

The next step is to calculate ∠ABE.

$\angle ABE=2(10)+7=20+7=27$

Consequently, the measurement of angle ABE is 27°.

4 0

2 months ago

Which element can form a chloride with a general formula of MCl2 or MCl3

lorasvet [2795]

The oxidation state numbercan aid in identifying the unknown element present in both compounds. They denote the number of electrons that are either donated, received, or shared to yield compounds.

Remember the fundamental principles governing oxidation numbers.

1. In a neutral compound, the total of all oxidation numbers is zero.
2. Chlorine, bromine, and iodine typically exhibit an oxidation number of -1(unless paired with fluorine and oxygen)

Assume the oxidation state for element Mis designated as x.
Referring to rule 2, chlorine possesses an oxidation state of -1.

Now, for the compound MCl₂ (which is neutral), the equation can be formulated as
x + (2 * -1)= 0 ⇒ x₁= +2

For MCl₃, the corresponding equation is
x + (3 * -1)= 0 ⇒ x₂= +3

This indicates that the elementhas two distinct oxidation statesin its compounds, which are +2and +3.

The identified element is iron (Fe), as it shows +2 and +3 oxidation states across these compounds.

Memorizing this is essential. Regrettably, there isn't a simpler method to tackle these oxidation states.

The final answer is iron (Fe).

5 0

2 months ago