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
bulgar [2K]
2 years ago
15

How many valence electrons does B on the periodic table have

Chemistry
1 answer:
rosijanka [135]2 years ago
3 0

Answer:

3

Explanation:

  • Boron(B) lies in 2nd period.
  • It has Atomic no 5
  • Lets look at Electronic configuration

\\ \bull\tt\dashrightarrow 1s^22s^22p^1

You might be interested in
Determine the free energy(ΔG) from the standard cell potential (Ecell0 ) for the reaction:2ClO2-(aq)+Cl2(g)→2ClO2(g)+ 2Cl-(aq)wh
Dima020 [189]

<u>Answer:</u> The \Delta G^o for the given reaction is -7.84\times 10^4J

<u>Explanation:</u>

For the given chemical reaction:

2ClO_2^-(aq.)+Cl_2(g)\rightarrow 2ClO_2(g)+2Cl^-(aq.)

Half reactions for the given cell follows:

<u>Oxidation half reaction:</u> ClO_2^-\rightarrow ClO_2+e^-;E^o_{ClO_2^-/ClO_2}=0.954V  ( × 2)

<u>Reduction half reaction:</u> Cl_2+2e^-\rightarrow 2Cl(g);E^o_{Cl_2/2Cl^-}=1.36V

Oxidation reaction occurs at anode and reduction reaction occurs at cathode.

To calculate the E^o_{cell} of the reaction, we use the equation:

E^o_{cell}=E^o_{cathode}-E^o_{anode}

Putting values in above equation, we get:

E^o_{cell}=1.36-(0.954)=0.406V

To calculate standard Gibbs free energy, we use the equation:

\Delta G^o=-nFE^o_{cell}

Where,

n = number of electrons transferred = 2

F = Faradays constant = 96500 C

E^o_{cell} = standard cell potential = 0.406 V

Putting values in above equation, we get:

\Delta G^o=-2\times 96500\times 0.406=-78358J=-7.84\times 10^4J

Hence, the \Delta G^o for the given reaction is -7.84\times 10^4J

4 0
3 years ago
Which of the following molecules would exhibit only London forces?a)CH4, BH3, and CCl4b)H2O, NH3, and CCl4c)PH3, NH3, and CCl4
Alex787 [66]

Answer:

a)CH₄, BH₃, and CCl₄

Explanation:

<u>London dispersion forces:- </u>

The bond for example, in the molecule is F-F, which is non-polar in nature because the two fluorine atoms have same electronegativity values.

The intermolecular force acting in the molecule are induced dipole-dipole forces or London Dispersion forces / van der Waals forces which are the weakest intermolecular force.

Out of the given options, H₂O , NH₃ exhibits hydrogen bonding which is:-

<u>Hydrogen bonding:- </u>

Hydrogen bonding is a special type of the dipole-dipole interaction and it occurs between hydrogen atom that is bonded to highly electronegative atom which is either fluorine, oxygen or nitrogen atom.

Thus option B and C rules out.

<u>Hence, the correct option which represents the molecules which would exhibit only London forces is:- a)CH₄, BH₃, and CCl₄</u>

4 0
3 years ago
Help! Please :) Thank you
BartSMP [9]
First one??

I believe this is the correct answer
5 0
3 years ago
How many moles are in 158 grams of LiCl
Usimov [2.4K]

Answer:

Number of moles = 3.73 mol

Explanation:

Given data:

Mass of LiCl = 158 g

Number of moles = ?

Solution:

Formula:

Number of moles = mass/ molar mass

Molar mass of LiCl = 42.4 g/mol

Number of moles =  158 g / 42.4 g/mol

Number of moles = 3.73 mol

7 0
3 years ago
How many grams of hydrogen gas are needed to react completely with 54.0 g of oxygen gas, given the following balanced chemical r
Shkiper50 [21]

Answer:

6.75g of hydrogen will completely react with 54g of oxygen

Explanation:

6 0
2 years ago
Other questions:
  • Currently this lab is run qualitatively asking only for whether a solution is acidic, neutral, or basic. If quantitative informa
    7·1 answer
  • In a spontaneous reaction -
    7·1 answer
  • A neutral atom of beryllium (Be) has an average mass of 9 amu and 4 electrons. How many neutrons does it have?
    11·2 answers
  • Am I correct? Because I’m kinda in between answers
    12·2 answers
  • a bar of gold is melted into liquid the liquid is then poured into a mold to make pieces of jewelry is the process a chemical ch
    10·1 answer
  • Which of the following equations is balanced?
    9·1 answer
  • Which of the following is NOT a sign of a chemical reaction:
    9·2 answers
  • How is the process of mitosis essential to the survival of an organism?
    10·1 answer
  • I have a mixture of three gases in a flask at 25 oC. The total pressure in the flask is 26.2 psi. If my gas mixture consists of
    11·1 answer
  • Provide only the major alkene product that results when n,n-dimethylhexan-2-amine undergoes cope elimination?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!