1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Serggg [28]
3 years ago
14

NEED ASAP

Chemistry
2 answers:
solmaris [256]3 years ago
6 0
The shape of the H2O molecule is a Bent Triatomic.
It isn't symmetrical.
The H2O molecule is polar.
Ludmilka [50]3 years ago
4 0

Answer:

The answers are in the explanation.

Explanation:

Analyze the form of H2O: The water molecule is composed of an oxygen atom, linked to two hydrogen atoms. The oxygen atom shares one pair of electrons with each hydrogen atom, leaving two pairs of free electrons in the oxygen without sharing.

What is the shape of the H2O molecule? The pairs of unshared electrons exert a repulsion, so the molecule acquires the angular shape.

Is it symmetrical? The H2O molecule is asymmetric due to free electron pairs.

Does this mean that the H2O molecule is polar or non-polar? Does this mean that the molecule is polar, as the uneven distribution of electrons gives it a slightly negative charge near the oxygen atom and a slightly positive charge near the hydrogen atoms.

Have a nice day!

You might be interested in
Even when an object appears to be at rest, its atoms and molecules are in constant motion
natita [175]

Answer:

the answer is True

Explanation:

the answer is True

5 0
2 years ago
You determine that it takes 26.0 mL of base to neutralize a sample of your unknown acid solution. The pH of the solution when ex
mojhsa [17]

Answer:

a. 1.78x10⁻³ = Ka

2.75 = pKa

b. It is irrelevant.

Explanation:

a. The neutralization of a weak acid, HA, with a base can help to find Ka of the acid.

Equilibrium is:

HA ⇄ H⁺ + A⁻

And Ka is defined as:

Ka = [H⁺] [A⁻] / [HA]

The HA reacts with the base, XOH, thus:

HA + XOH → H₂O + A⁻ + X⁺

As you require 26.0mL of the base to consume all HA, if you add 13mL, the moles of HA will be the half of the initial moles and, the other half, will be A⁻

That means:

[HA] = [A⁻]

It is possible to obtain pKa from H-H equation (Equation used to find pH of a buffer), thus:

pH = pKa + log₁₀ [A⁻] / [HA]

Replacing:

2.75 = pKa + log₁₀ [A⁻] / [HA]

As [HA] = [A⁻]

2.75 = pKa + log₁₀ 1

<h3>2.75 = pKa</h3>

Knowing pKa = -log Ka

2.75 = -log Ka

10^-2.75 = Ka

<h3>1.78x10⁻³ = Ka</h3>

b. As you can see, the initial concentration of the acid was not necessary. The only thing you must know is that in the half of the titration, [HA] = [A⁻]. Thus, the initial concentration of the acid doesn't affect the initial calculation.

7 0
3 years ago
If you are asked to compare matter in solid, liquid, and gaseous states, which statement best defines a gas?
Elza [17]
I am pretty sure that <span>If I were asked to compare matter in solid, liquid, and gaseous states, the statement which would best defined a gas is </span>highest energy, highest molecular motion, and least dense packaging of molecules. I choose this one because it's not sensible to <span>heat CO2 (in case of safety) and in the last option the amount of energy is not satisfying.

Hope it helps!</span>
8 0
3 years ago
Read 2 more answers
7.296 x 10^2 / 9.6 x 10^-9
pychu [463]
Can you use a calculator? If so, demos works great for problems like these!
8 0
3 years ago
Read 2 more answers
Write the overall balanced equation for the reaction of magnesium and hcl to form hydrogen gas
miv72 [106K]
The balanced equation:
Mg+2HCl⇒ MgCl₂+H₂
4 0
3 years ago
Other questions:
  • How does the size change when an atom forms a cation and when an atom forms an anion?
    14·1 answer
  • The vapour pressure of pure benzene at 20 °C is 75 Torr and that of pure methylbenzene is 25 Torr at the same tempera-ture. In a
    10·1 answer
  • 1. The reaction below describes cellular respiration. Which compounds are the reactants and which are the
    5·1 answer
  • 3. Calculate the atomic mass of bromine. The two isotopes of bromine have atomic masses and relative abundance of 78.92 amu (50.
    11·1 answer
  • If a solution containing A+ ions and a solution containing B- ions have just been mixed and [A+][B-] is greater than Ksp of AB,
    15·1 answer
  • How would local residents of a place be affected by changes in the hydrosphere? (please help!!)
    11·2 answers
  • How many grams in 4.5 moles of H2O?
    7·1 answer
  • Find the atomic numbers of the as yet undiscovered next two members of the series.
    12·1 answer
  • Ill give brainlest to the one who answers right.
    5·1 answer
  • The location of elements in the regions of Earth has enormous practical importance.(a) Define differentiation, and explain which
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!