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3 years ago

What symbol would represent a chlorine ion with a stable arrangement of eight valence electrons?

2 answers:

7 0

Cl-
(The - needs to be at the top by the way)
This shows it has gained an electron to form a stable ion which gives it a negative charge (as there are now more electrons then protons)

:)

Sergeeva-Olga [200]3 years ago

4 0

Answer:

Cl⁻

Explanation:

Elements in the periodic table (with the exception of group 0 elements) want to achieve there octet configuration and as such gain or lose electron(s) in order to achieve that. When an atom loses electron(s), it becomes positively charged and when it gains, it becomes negatively charged.

Chlorine (Cl) has 17 electrons.

₁₇Cl → 1S² 2S² 2P⁶ 3S² 3P⁵

From the above, it can be deduced that chlorine has 7 (5+2) electrons in its outermost shell and hence needs just one electron to achieve it's octet configuration. When chlorine gains this one electron it requires to achieve it's octet configuration, it becomes negatively charged (as explained earlier). Thus, it is represented as Cl⁻.

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Write a scientific explanation that compares the electrical forces of ethanol, hexane, and water.

olchik [2.2K]

Answer:

"Water and ethyl alcohol will both have dipole-dipole interactions.

Technically they will both have Hydrogen bonding, which is a type of dipole-dipole. This is due to the high electronegativity values of oxygen atoms compared to the carbon and hydrogen atoms the oxygens bond to. This causes regions of both of these molecules that have partial negative charges and other regions wind up with partial positive charges.

Hexane will not have any dipole-dipole interactions because it is a non-polar molecule. The intermolecular forces between hexane molecules will be dispersion forces."

Explanation:

Here is the place I found the answer: https://socratic.org/questions/which-of-these-structures-has-dipole-dipole-interactions-water-h2o-ethyl-alcohol

All of this answer belongs to that person. I do not own any of this information.

5 0

3 years ago

You are given a bottle of NaOH of an unknown concentration. You are tasked with determining the concentration of this solution.

Salsk061 [2.6K]

Answer:

0.07975 M NaOH

Explanation:

First determine the molarity of your acid, KHP. Convert grams to moles using the MW given and then divide by the volume of water.

0.3175 g KHP • (1 mol KHP / 204.2 g KHP) = 0.001555 mol KHP

0.001555 mol KHP / 0.040 L = 0.03888 M KHP

The reaction between KHP and NaOH is one-to-one, so you can just use M1V1 = M2V2 to solve for M2 (the molarity of NaOH).

M1 = 0.03888 M KHP

V1 = 40 mL

M2 = ? M NaOH

V2 = 19.45 mL NaOH

(0.03888 M KHP)(40 mL) = M2(19.5 mL NaOH)

M2 = 0.07975 M NaOH

4 0

3 years ago

Hyposulfite, SO22–, is a polyatomic ion that has not yet been definitively confirmed to exist. However, the VSEPR model may stil

LUCKY_DIMON [66]

Answer:

The most reasonable estimate for the O–S–O bond angle in hyposulfite = 106°

Explanation:

Hyposulphite (so₂²⁻) is polyatomic ion .

According to VSEPR model

Total elrctron pairs $=\frac{1}{2} [V+X -C+A]$

V = Valence shell electrons of central element

X = No. of monovalent surrounding atoms

C = Cationic charge

A = Anionic charge

Total electron pairs $=\frac{1}{2}[6+0-0+2]= 4$

That is two bond pairs and two lone pairs

6 0

3 years ago

Which of the following is a list of the minimum amount of data needed for determining the molar enthalpy of solution of KCl(s) i

Gre4nikov [31]

Answer:

Explanation:

molar enthalpy of solution of KCl(s) is heat evolved or absorbed when one mole of KCl is dissolved in water to make pure solution . The heat evolved or absorbed can be calculated by the following relation.

Q = msΔt where m is mass of solution or water , s is specific heat and Δt is change in temperature of water .

So data required is mass of water or solution , initial and final temperature of solution , specific heat of water is known .

Now to know molar heat , we require mass of solute or KCl dissolved to know heat heat absorbed or evolved by dissolution of one mole of solute .

3 0

3 years ago

Rank the following substances based on the forces present in each molecule from weakest to strongest - Cl2 , LiF , OF2 , CH4 , N

solniwko [45]

Answer:

c12, ch4, of2, lif, nh3

Explanation:

8 0

4 years ago