A natural atom possesses the atomic number of 13 and a atomic mass of 27. Three electrons are lost. From what region of the atom are they lost?

Answers

Answer 1

Answer:

Answer:

The electrons are lost from the valence shell (outermost electron shell) of the atom.

Explanation:

This is able to be inferred not only because valence electrons being lost first is a trend but also because the atom in question has actually 3 valence electrons (13-2-8 = 3).

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When NaOH is added to water, the (OH) = 0.04 M. What is the [H30*]?What is the PH of the solution?

Answers

Answer:

[H₃O⁺] = 2.5 × 10⁻¹³ M

pH = 12.6

Explanation:

Step 1: Given data

Concentration of OH⁻: 0.04 M

Step 2: Calculate the concentration of H₃O⁺

Let's consider the self-ionization of water reaction.

2 H₂O(l) ⇄ OH⁻(aq) + H₃O⁺(aq)

The ionic product of water is:

Kw = [OH⁻] × [H₃O⁺] = 10⁻¹⁴

[H₃O⁺] = 10⁻¹⁴ / [OH⁻]

[H₃O⁺] = 10⁻¹⁴ / 0.04

[H₃O⁺] = 2.5 × 10⁻¹³ M

Step 3: Calculate the pH

The pH is:

pH = -log [H₃O⁺] = -log 2.5 × 10⁻¹³ = 12.6

1. On the basis of your results, what is the relationship between the temperature of the solvent and the rate of solution formation?

Answers

Answer: As the temperature increases, the rate of formation of solution increases.

Explanation:

Solvent is defined as a substance which is present in larger proportion in a solution. Solute is dissolved in the solvent to form a solution.

As, the temperature of the solvent increases, the kinetic energy of the particles of solvent increases and the intermolecular spacing between the solvent particles increases and therefore, this results in the more dissolution of the solute particles in the solvent and hence, the formation of solution increases.

Therefore, there is a direct relationship between the temperature of the solvent and the formation of the solution.

Answer:

Hot temp = solution forming faster.

Explanation:

Salt in hot water dissolves faster than salt in ice water.

Balance the following redox reaction if it occurs in acidic solution. What are the coefficients in front of Ni and H+ in the balanced reaction? Ni2+(aq) + NH4+(aq) → Ni(s) + NO3-(aq)

Answers

In this case, the problem is asking for the balance of a redox reaction in acidic media, in which nickel is reduced to a metallic way and nitrogen oxidized to an ionic way.

Thus, according to the given information, it turns out possible for us to balance this equation in acidic solution by firstly setting up the half reactions:

$Ni^(2+)+2e^-\rightarrow Ni^0\n\nN^(3-)H_4^++3H_2O\rightarrow N^(5+)O_3^-+8e^-+10H^+$

Next, we cross multiply each half-reaction by the other's carried electrons:

$8Ni^(2+)+16e^-\rightarrow 8Ni^0\n\n2N^(3-)H_4^++6H_2O\rightarrow 2N^(5+)O_3^-+16e^-+20H^+$

Finally, we add them together to obtain:

$8Ni^(2+)+2N^(3-)H_4^++6H_2O\rightarrow 8Ni^0+2N^(5+)O_3^-+20H^+$

Which can be all simplified by a factor of 2 to obtain:

$4Ni^(2+)+N^(3-)H_4^++3H_2O\rightarrow 4Ni^0+N^(5+)O_3^-+10H^+\n\n4Ni^(2+)(aq)+NH_4^+(aq)+3H_2O(l)\rightarrow 4Ni(s)+NO_3^-(aq)+10H^+(aq)$

Hence, the coefficients in front of Ni and H⁺ are 4 and 10 respectively.

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Write balanced net ionic equations and the corresponding equilibrium equations for the stepwise dissociation of the triprotic acid H3PO4.

Answers

Answer:

$H_3PO_4(aq)+H_2O(l)\rightleftharpoons H_3O^+(aq)+H_2PO_4^(-)(aq); \ Ka_1$

$H_2PO_4^(-)(aq)+H_2O(l)\rightleftharpoons H_3O^+(aq)+HPO_4^(-2)(aq); \ Ka_2$

$HPO_4^(-2)(aq)+H_2O(l)\rightleftharpoons H_3O^+(aq)+PO_4^(-3)(aq); \ Ka_3$

Explanation:

Hello!

In this case, since the phosphoric acid is a triprotic acid, we infer it has three stepwise ionization reactions in which one hydrogen ion is released at each step, considering they are undergone due to the presence of water, thus, we proceed as follows:

$H_3PO_4(aq)+H_2O(l)\rightleftharpoons H_3O^+(aq)+H_2PO_4^(-)(aq); \ Ka_1$

$H_2PO_4^(-)(aq)+H_2O(l)\rightleftharpoons H_3O^+(aq)+HPO_4^(-2)(aq); \ Ka_2$

$HPO_4^(-2)(aq)+H_2O(l)\rightleftharpoons H_3O^+(aq)+PO_4^(-3)(aq); \ Ka_3$

Moreover, notice each step has a different acid dissociation constant, which are quantified in the following order:

Ka1 > Ka2 > Ka3

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Models can have the same
general appearance as real-ufe
objects.
True or false

Answers

Answer:

true

Explanation:

Answer:

True

Explanation:

Because its true

If you perfom 30 joules of work lifting a 20-N box from the floor to a shelf how high is the shelf

Answers

Answer: 1.5 m

Explanation: E=mgh=Fh

30 J = 20 N * h

h = 30/20 = 1.5 m

Answer:

1.5 m

Explanation:

it just is its easy made A on test

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In their elemental forms, the halogens are Select one: a. strong oxidizing agents. b. strong reducing agents. c. strong acids. d. strong bases. e. amphoteric.