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
viktelen [127]
3 years ago
11

An element Argon has atomic number 18. Deduce the electronic configuration of the elements and suggest the group to which this e

lement belong.​
Chemistry
1 answer:
gulaghasi [49]3 years ago
3 0

Answer:

8th or 0th group known as Noble gases

You might be interested in
Calculate the pH of the cathode compartment solution if the cell emf at 298 K is measured to be 0.660 V when (Zn^2+)=0.22 M and(
yaroslaw [1]

Answer:

pH = 2.059

Explanation:

At the Cathode:

The reduction reaction is:

2H^+ + 2e^- \to H_2   \ \ \ \mathbf{E^0_{red}= 0.00 \ V}

At the anode:

At oxidation reaction is:

Zn \to Zn^{2+} +2e^-   \ \ \ \mathbf{E^0_{ox} = 0.76 \ V}

The overall equation for the reaction is:

\mathbf{Zn + 2H^+ \to Zn^{2+} + H_2}

The overall cell potential is:

\mathbf{E^0_{cell}= E^0_{ox} + E^0_{red}}

\mathbf{E^0_{cell}= 0.76 \ V +0.00 \ V}

\mathbf{E^0_{cell}= 0.76\ V}

Using the formula for the Nernst equation:

E = E^0 - ( \dfrac{0.0591}{n})log (Q)\\

where;

E = 0.66

(Zn^2+)=0.22 M

Then

0.66 =0.76- ( \dfrac{0.0591}{2})log \bigg ( \dfrac{[Zn^{2+} ] PH_2}{[H^+]^2} \bigg )

0.66 =0.76- 0.02955 * log \bigg ( \dfrac{0.22*0.87}{[H^+]^2} \bigg )

3.4 = log ( 0.1914) - 2 log [H⁺]

3.4 = -0.7180 - 2 log [H⁺]

3.4 + 0.7180 = - 2 log  [H⁺]

4.118  = - 2  log  [H⁺]

pH = log [H⁺] = 4.118/2

pH = 2.059

8 0
3 years ago
Aniline is more basic than cyclohexylamine because: (A) electrons on the aniline nitrogen are somewhat delocalized into the arom
Nady [450]

Answer:

The correct answer is A electron on the aniline nitrogen are somehow delocalized to the aromatic ring.

Explanation:

The structure of aniline contain double bonds and lone pair of electron in the nitrogen atom of -NH2 group that is attached to the benzene ring.

  The electron pair present in the nitrogen atom of -NH3 group of aniline undergo delocalization with the aromatic ring of benzene resulting in the formation of resonance hybrid that increases the ability of nitrogen atom of -NH2 group of aniline to easily donate that lone pair of electron.

 ON the other hand the resonance stabilization cannot be possible with the cyclohexylamine ring as it is saturated.

3 0
4 years ago
Why is energy required to remove an electron from an atom?
Yanka [14]

Electrons in an atom are held there by the force of attraction exerted by the positive charge of the nucleus on the negative charge of the electron. Energy is required to remove an electron from atom to overcome this attractive force.

4 0
3 years ago
A generator is not required to generate electrical energy when which of the following energy sources is used?
Anon25 [30]

Answer:

think it's C but my gut is telling me A

Explanation:

5 0
3 years ago
Read 2 more answers
In a radio, ______ energy is transformed into ______ energy.​
Rina8888 [55]

Answer:

In a radio, chemical energy is transformed into sound energy

4 0
3 years ago
Other questions:
  • Is an electron a lone pair electron if it is unbonded, but not in a pair?
    10·2 answers
  • How would you find out if the enthalpy for the two questions exothermic or endothermic?
    12·1 answer
  • Which of the following items are true of early nuclear science?
    6·1 answer
  • You have a balloon with a fixed amount of air in a sealed jar at room temperature. The balloon doesn't fill the entire jar. You
    9·1 answer
  • If a dog has a mass of 21.5kg, what is his mass in the following units?
    7·1 answer
  • The metric system of units is known as
    11·1 answer
  • What mass of sucrose is needed to make 300.0 mL of a 0.5 M solution? (molar mass=<br> 342.34 g/mol)
    7·1 answer
  • WDYT a mixture is? Please help
    12·1 answer
  • 4NH3(g) + 6NO(g)→5N2(g) + 6H2O(g) Using the balanced equation calculate the mass of N2 produced from 100 grams of NH3 racing wit
    13·1 answer
  • NEED THIS ASAP PLEASE HELP!! WILL GIVE 10 PTS!! WILL MARK BRAINLIST!!
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!