CHEMISTRY HIGH SCHOOL

What can be added to an atom to cause a nonvalence electron in the atom to temporarily become a valence electron?energy
mass
neutrons
electrons

Answers

Answer 1
Answer:

Answer:energy

Explanation:
Answer 2
Answer:

Energy can be added to an atom to cause a non-valence electron in the atom to temporarily become a valence electron. The correct option is A.

What are valence electrons?

Valence electrons are those electrons that are present in the outermost shell of the atom. These electrons are free to form bonds with another atoms.

Non-valence electrons are preset in the inner shell of the element. These shell are fulfilled with electrons, and these electrons does need to form bonds with other atoms to fulfill their orbit.

The electrons in the orbit have different energies present. The energy change when the electrons transfer from one shell to another shell. When energy is given to the electron, they move to the higher orbit or shell.

Thus, the correct option is A, energy.

To learn more about valence electrons, refer to the link:

brainly.com/question/1357920

#SPJ6

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Calculate the hydrogen-ion concentration [H+] for the aqueous solution in which [OH-] is 1 x 10-11 mol/L. Is this solution acidic, basic, or neutral? Show your work

What is the mass of a neutron?

Answers

1.008 I am Very sure We just learned this..
1.008 amu is the mass of a neutron. 

Which is a diatomic molecule?
A. Ar
B. CO
C. CO2
D. NaCl

Answers

NaCI is the answer, in what my teacher taught me. Hope I helped :)

Calculate the pH of a solution that has a [OH−] of 2.6 × 10^−6 M.A. 8.4
B. 6.5
C. 7.7
D. 6.29

Answers

Answer:

A. 8.4

Explanation:

[OH⁻] = 2.6 × 10⁻⁶               Take the negative log of each side

-log[OH⁻] = pOH = 5.59     Apply the pH/pOH relation

pH + pOH = 14.00               Insert the value of pOH

pH + 5.59 = 14.00               Subtract 5.59 from each side

pH = 14.00 -5.59 = 8.41

Lysine is used as a topical medicinal skin creme. what is the molecular formula of lysine if the empirical formula is c3h7no, and the approximate molar mass is 146 g/mol

Answers

Molecular Formula is calculated using following formula,

Molecular Formula  =  n (Empirical Formula)     ----- (1)

Calculating n;

                      n  =  Molecular Weight / Empirical Formula Weight  --- (2)

Empirical formula weight = (12×3) + (1×7) + (14×1) + (16×1)

Empirical formula weight = (36) + (7) + (14) + (16)

Empirical formula weight = 73

Putting values in Eq. 2,

                                n  =  146 / 73

                                n  =  2

Putting Value of n and Empirical Formula in Eq. 1,

Molecular Formula  =  2 × C₃H₇NO

Molecular Formula  =  C₆H₁₄N₂O₂

Result:
           Molecular Formula of Lysine is C₆H₁₄N₂O₂.

Which type of reaction is represented by the generic equation AB + CD mc002-1.jpg AD + CB?combustion

decomposition

single replacement

double replacement

Answers

Answer : Option D) Double replacement

Explanation : Double displacement or replacement reactions are those in which the two reactant molecules exchange the cations and anions between them and give a new product.

So, in this case when the reaction is AB + CD → AD + CB

Here, both the species of reactant compound molecule went replacement with the adjacent cation and anion group and formed a new compound or product. Therefore, this can be called as double replacement reaction.
The type of reaction is represented by the generic equation AB + CD -> AD + CB is double replacement. The rest of the choices do not answer the question above. 

What is the molarity of a solution where 1.00 gram of NaCl (MM 58.5 g/mol)is dissolved in enough water to make 415 mL of solution?
a. 4.12 x 10-5 M

b. 7.09 x 10-3 M

c. 4.12 x 10-2 M

d. 2.41 M

Answers

To find the molarity of the solution, we need to use the formula:

Molarity (M) = moles of solute / volume of solution (in liters)

First, let's calculate the number of moles of NaCl using its molar mass (MM):

Mass of NaCl = 1.00 gram

Molar mass of NaCl = 58.5 g/mol

Moles of NaCl = Mass of NaCl / Molar mass of NaCl

= 1.00 g / 58.5 g/mol

≈ 0.0171 mol

Next, we need to convert the volume of the solution from milliliters (mL) to liters (L):

Volume of solution = 415 mL = 415 / 1000 L

= 0.415 L

Now, we can calculate the molarity:

Molarity (M) = moles of solute / volume of solution

= 0.0171 mol / 0.415 L

≈ 0.0412 M

Therefore, the molarity of the solution is approximately 0.0412 M.

The closest answer option is c. 4.12 x 10^-2 M.

I hope this explanation helps! Let me know if you have any further questions.
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