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
Klio2033 [76]
3 years ago
15

11. 2073 Set D Q.No. 1 Ammonia molecule has got trigonal

Chemistry
1 answer:
Nikolay [14]3 years ago
5 0

Answer:

See explanation

Explanation:

I know that we usually associate the sp3 hybridization to the tetrahedral shape. This is common in molecules such as CH4. So it may sound somewhat strange that NH3 molecule has an sp3 hybridized nitrogen atom and a trigonal pyramidal geometry.

Let us recall that the central nitrogen atom in NH3 has a lone pair of electrons. These lone pairs causes more repulsion than bond pairs. As a result of the presence of this lone pair, the bond angle in the NH3 molecule is distorted away from the expected 109.7 degrees in tetrahedral geometry and the bonding groups are now arranged in a trigonal pyramidal geometry(with bond angle less than 109.7 degrees) to minimize electron pair repulsions.

You might be interested in
Enter the chemical formula of a binary molecular compound of hydrogen and a Group 6A element that can reasonably be expected to
Ber [7]

Answer:

H₂Se

Explanation:

A way of estimating the acidity of a weak acid is by analizing the<em> stability of the formed anion</em>. In this case, we should find a Group 6A element that in its anionic forms (HX⁻ and X⁻²) is more stable than HS⁻ and S⁻², thus it would be more acidic in aqueous solution.

The anionic forms of Se are more stable than the forms of S, similarly to how Br⁻ is more stable than Cl⁻.

8 0
3 years ago
1.Which statement best describes scientific laws
gtnhenbr [62]
In a way, all of the answers could be argued for (for example: in the first option: if the scientists' opinions are understood to be "informed understanding of the causes of events"), but one of the options is the best:
Scientific laws describe specific relationships in nature without offering
an explanation.

The reason why  I think this is true is that many laws are phased too short and too concise to provide comprehensive explanations, instead they describe the relationships that must hold.


One of the options is pplain false:
Scientific laws explain why natural events occur. -"Scientific laws were theories that have been tested, proven, and adopted as laws." - since they are not adopted as laws. 



6 0
3 years ago
PLEASE HURRY
Aloiza [94]

Answer:

C. The conditions in which a substance exists in a certain phase.

Explanation:

7 0
3 years ago
Consider the reaction Ca(OH)2(s)→CaO(s)+H2O(l) with enthalpy of reaction ΔHrxn∘=65.2kJ/mol What is the enthalpy of formation of
Ganezh [65]

Answer:

ΔH °fCaO= -655.09 KJ/mol =  ΔH °fCaO

Explanation:

ΔH °(reaction)a=ΔH °f(product)-ΔH °f(reactant)

where,

ΔH °f(product)=is the standard heat of formation of products

-ΔH °f(reactant)=is the standard heat of formation of reactants

The standard heat of formation of  H 2 O ( l )  is  − 285.8 k J / m o l .

The standard heat of formation of  Ca(OH )2  is  − 986.09 k J / m o l .

For the given reaction, the standard enthalpy change is calculated by the expression shown below.

ΔH °(reaction)a=ΔH °f(CaO+H2O)-ΔH °f(Ca(OH)₂

65.2                =  ΔH °fCaO+( -265.8) -(-986.09)

                       = ΔH °fCaO-265.8+986.09

65.2                        =  ΔH °fCaO+ 720.29

65.2-720.29      =  ΔH °fCaO

-655.09 KJ/mol ==  ΔH °fCaO

3 0
3 years ago
A plant dying after being exposed to poison represents a physical change true or false?
r-ruslan [8.4K]
Yes, i believe that it can have a physical change but it is most likely chemical.
3 0
4 years ago
Read 2 more answers
Other questions:
  • What type of bond hold bleaching powder atoms together?
    12·1 answer
  • a substance that changes the rate of the reaction and is not consumed in the reaction 1 catalyst 2. a uniform mixture of molecul
    6·2 answers
  • A system absorbs 12 J of heat from the surroundings; meanwhile, 28 J of work is done on the system. What is the change of the in
    6·1 answer
  • Identify the independent and dependent variables. Peter is conducting an experiment to see how much salt will dissolve in water
    10·1 answer
  • A certain second-order reaction (B→products) has a rate constant of 1.30×10−3 M−1⋅s−1 at 27 ∘C and an initial half-life of 224 s
    13·1 answer
  • ______ and _____ are found in the nucleus​
    7·2 answers
  • A student tests a solid sample of a compound and determines that it does not conduct electric
    7·1 answer
  • Carboxylic acids can be made from Grignards by treating the Grignard reagents with ________. aldehydes carbon dioxide diborane c
    6·1 answer
  • Suppose you needed to cool off 19.8 grams of water at 33.3 °C to 28 °C. Calculate the energy released in this process.
    7·1 answer
  • Given that E
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!