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Which element has a complete valence electron shell?selenium (Se)
oxygen (0)
fluorine (F)
argon (Ar)
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Answers

Answer 1
Answer:

Final answer:

Argon (Ar) has a complete valence electron shell.


Explanation:

The element that has a complete valence electron shell is argon (Ar).


Learn more about complete valence electron shell here:

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Which factor is likely to impact the possible number of compounds?

Answers

Answer:

The correct answer is the tendency of all the elements to react with every other element.  

Explanation:

A component in which two or more elements are bonded chemically leads to the production of a compound. A compound refers to a pure component as it comprises elements that are in their pure state. The formation of a compound takes place when the elements react with each other based upon their reactivity.  

For example, the element chlorine is deficient of one electron and the element sodium exhibits one additional electron. Thus, chlorine easily reacts with the sodium in order to obtain stability. Therefore, the formation of sodium chloride takes place. Hence, it can be concluded that the tendency of all the elements to react with every other element is the condition, which is possible to influence the probable number of compounds.
the impact of possible number of compounds is the ability of all elements to react with every other atoms

Consider two aqueous solutions of NaCl. Solution 1 is 4.00 M and solution 2 is 0.10 M. In what ratio (solution 1 to solution 2) must these solutions be mixed in order to produce a 0.86 M solution of NaCl

Answers

Answer:

The ratio of solution 1 to solution 2 is 24.20 to 100.00.

Explanation:

We will mix V₁ (L) of solution 1 with V₂ (L) of solution 2 to get the final solution.

So the mole concentration in the final solution is calculated as below, note that C₁ is the concentration of solution 1, and C₂ is the concentration of solution 2

[M] = (V_(1) C_(1) +V_(2)C_(2))/(V_(1)+V_(2)) = \frac{4 V_(1) + 0.1 V_(2)}_{V_(1)+V_(2)}}=0.86

Then we can calculate for the ratio

(V_(1))/(V_(2))=(0.86-0.10)/(4.00-0.86) =(0.76)/(3.14) or (24.20)/(100.00)

Energy levels in an electron configuration correspond to what on the periodic table?

Answers

I believe energy levels correspond to periods on the periodic table.

A 135 g sample of H20 at 85°C is cooled. The water loses a total of 15 kJ of energy in the coolingprocess. What is the final temperature of the water? The specific heat of water is 4.184 J/g.°C.

A. 112°C

B. 58°C

C. 70°C

D. 84°C

E. 27°C

Answers

Answer:

B. 58°C

Explanation:

Hello,

In this case, the relationship among heat, mass, specific heat and temperature for water is mathematically by:

Q=mCp\Delta T=mCp(T_2-T_1)

In such a way, solving for the final temperature T_2 we obtain:

T_2=T_1+(Q)/(mCp)

Therefore, we final temperature is computed as follows, considering that the involved heat is negative as it is lost for water:

T_2=85\°C+(-15kJ*(1000J)/(1kJ) )/(135g*4.184(J)/(g\°C) )\n\nT_2=58\°C

Thereby, answer is B. 58°C.

Regards.

Final answer:

The final temperature of the water is approximately 58°C (Option B) after it has lost 15 kJ of energy in the cooling process.

Explanation:

To calculate the final temperature of the water, we can use the formula of heat loss or gain, Q = mcΔT, where Q is the heat loss or gain, m is the mass, c is the specific heat, and ΔT is the change in temperature.

Setting the given values into our formula: -15,000 J = (135 g) * (4.184 J/g°C) * (T_final - 85°C).

Solving this equation for T_final gives us T_final ≈ 58°C. Hence, the suitable answer would be option B: 58°C.

Learn more about Heat Transfer here:

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15) What is the hydronium ion concentration [H3O + ] of a 0.125 M hydrocyanic acid solution with Ka = 4.9 × 10-10? The equation for the dissociation of hydrocyanic acid is: HCN(aq) + H2O(l) ⇌ H3O+(aq) + CN- (aq)

Answers

The hydronium ion concentration [H₃O⁺]=7.826 x 10⁻⁶

Further explanation

In general, the weak acid ionization reaction  

HA (aq) ---> H⁺ (aq) + A⁻ (aq)  

Ka's value  

\large {\boxed {\bold {Ka \: = \: \frac {[H ^ +] [A ^ -]} {[HA]}}}}

Reaction

HCN(aq) + H₂O(l) ⇌ H₃O⁺(aq) + CN⁻ (aq)

0.125

x                                   x               x

0.125-x                         x               x

\tt Ka=([H_3O^+][CN^-])/([HCN^-])

\tt 4.9* 10^(-10)=(x^2)/(0.125-x)\approx (x^2)/(0.125)\n\nx^2=6.125* 10^(-11)\n\nx=7.826* 10^(-6)

Which of the following best describe gas particles?SELECT ALL THAT APPLY
a moving randomly
b collide into each other
c move slow
d high kinetic energy
e moving orderly

Answers

The gas particlesmove randomly (a), collide into each other (b) and have high kinetic energy (d).

Which of the following best describe gas particles?

a moving randomly.YES. They move in all directions without a predefined path.

b collide into each other.YES. They collide into each other and against the walls of the container they are in.

c move slow.NO. They move very rapidly.

d high kinetic energy.YES. Their high kinetic energy is a consequence of their fast movement.

e moving orderly.NO. They move in a random fashion.

The gas particlesmove randomly (a), collide into each other (b) and have high kinetic energy (d).

You can learn  more about gases here: brainly.com/question/11973814

Answer:

a,b,d

Explanation:

Gas particles fill space and do not move in an orderly fashion, and are constantly bumping into each other due to their high kinetic energy.
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