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Agata [3.3K]
3 years ago
7

Given BH3, O3, CO2, and NH3, which of these compound is an exception to the octet rules?

Chemistry
1 answer:
butalik [34]3 years ago
4 0

Answer:

a. BH₃

Explanation:

According to the octet rules, atoms reach stability when are surrounded by eight electrons in their valence shell when they combine to form a chemical compound.

From the options, the only compound in which the central atom does not meet the octet rules is BH₃. The central atom is boron (B), which has 3 electrons in its valence shell. When B is combined with hydrogen (H), 3 electrons from the 3 atoms of H are added. <em>The total amount of electrons is 6</em>, <em>fewer than 8 electrons</em> needed to meet the rule.

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A + heat -&gt; B endothermic reaction ΔH (+)
cupoosta [38]
The best and most correct answer among the choices provided by your question is the second choice.

<span>Based on the reaction given above, as the temperature decreases, the formation of the reactants will increase.</span>


I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
3 0
4 years ago
if a gas is held in 3.60 L, 298 K AND 800. mmHg, what is the new pressure of the gas if the volume us decreased by half and the
sleet_krkn [62]

Answer:

Explanation:

By Ideal Gas Law, P1*V1 / T1 = P2*V2 / T2

So new pressure = (P1*V1 / T1) / (V2 / T2)

= P1*V1*T2 / T1*V2

= 800*3.6*298 / 250*1.8

= 1907.2 mmHg

6 0
3 years ago
Read 2 more answers
How many moles of the Htion in 395 mL of 1.325 M sulfuric acid (H2SO4).
Irina18 [472]

Answer:

1.05 mol

Explanation:

Step 1: Given data

  • Molarity of sulfuric acid (M): 1.325 M (1.325 mol/L)
  • Volume of solution (V): 395 mL (0.395 L)

Step 2: Calculate the moles of sulfuric acid (n)

We will use the following expression.

M = n/V

n = M × V

n = 1.325 mol/L × 0.395 L = 0.523 mol

Step 3: Calculate the moles of H⁺

H₂SO₄ dissociates completely according to the following equation.

H₂SO₄ ⇒ 2 H⁺ + SO₄²⁻

The molar ratio of H₂SO₄ to H⁺ is 1:2. The moles of H⁺ are 2/1 × 0.523 mol = 1.05 mol.

7 0
3 years ago
Convert 2.0 micrometer to centimeters and to inches
Dima020 [189]

Answer:

2x10⁻⁴cm and 7.9x10⁻⁵ inches

Explanation:

Micrometer, μm, is an unit of length. Could be related with another units of lenght as, for example:

1.0μm = 1x10⁻⁴cm

1.0μm = 3.93701x10⁻⁵ inches

That means, 2.0μm are:

2.0μm * (1x10⁻⁴cm / 1μm) = 2x10⁻⁴cm

And:

2.0μm * (3.93701x10⁻⁵ inches / 1μm) = 7.9x10⁻⁵ inches

7 0
2 years ago
Q:Explain how a liquid is changed into a gas during boiling(heating) in terms of kinetic particle theory.
KatRina [158]

Answer:

A: as the liquid gets warmer more particles have sufficient energy to escape from the liquid. Eventually, particles in the middle of the liquid form bubbles of gas in the liquid.

A: the temperature will only increase once all the liquid particles change to gas.

Explanation:

5 0
2 years ago
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