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4 years ago

As the number of electrons added to the same principal energy level increases, atomic size generally

2 answers:

8 0

As the number of electrons added to the same principal energy level increases, atomic size generally A. increases.

Because as you add energy levels, the electrons are drawn to the nucleus of the atoms giving them a lesser charge. Thus its atomic size also increases.

aliya0001 [1]4 years ago

6 0

increases electrons form a shell around the nucleaus making it larger

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The equilibrium constant for A + 2B → 3C is 2.1 * 10^-6

Mariana [72]

Answer:

b- 4.4 * 10^-12.

Explanation:

Hello.

In this case, as the reaction:

A + 2B → 3C

Has an equilibrium expression of:

$K_1=\frac{[C]^3}{[A][B]^2}=2.1x10^{-6}$

If we analyze the reaction:

2A + 4B → 6C

Which is twice the initial one, the equilibrium expression is:

$K_2=\frac{[C]^6}{[A]^2[B]^4}$

It means that the equilibrium constant of the second reaction is equal to the equilibrium constant of the first reaction powered to second power:

$K_2=K_1^2$

Thus, the equilibrium constant of the second reaction turns out:

$K_2=(2.1 * 10^{-6})^2\\\\K_2=4.4x10^{-12}$

Therefore, the answer is b- 4.4 * 10^-12.

Best regards.

7 0

3 years ago

Which of the following would release the most heat upon cooling from 75*C to 50*C?

Tresset [83]

The answer should be 10g.

4 0

4 years ago

Read 2 more answers

SCIENCE .A mover has to lift a heavy box with a pulley. Which force is the greatest to overcome in order to lift the box?

aleksandrvk [35]

Most definitely gravity. Gravity is what makes things go up and or down

4 0

3 years ago

What is the classification of a solution of naoh with a ph of 8.3?

Maksim231197 [3]

Answer:

Alkaline or basic solution (alkaline and basic means the same)

Explanation:

According to the pH, solutions may be classified as neutral, acidic, or alkaline (basic).

This table shows such classification:

pH classification

7 neutral

> 7 alkaline or basic

< 7 acidic

Thus, since the pH of the solution is 8.3, which is greater than 7, the solution is classified as basic (alkaline).

Additionally, you must learn that pH is a logarithmic scale for the concentration of hydronium ions in the solution.

pH = - log [H₃O⁺]

You can calculate the concentration of hydronium ions using antilogarithm properties:

$pH=-log[H_3O^+]\\ \\ {[H_3O^+]}=10^{-pH}\\ \\ {[H_3O^+]}=10^{-8.3}=0.00000000501$

NaOH solutions are alkaline solutions, bases, according to Arrhenius model, because they contain OH⁻ ions and release them when ionize in water.

8 0

3 years ago

Sodium hydroxide (NaOH) and elemental sodium (Na)

Olegator [25]

Answer:

If the question is which can make a buffer, then NH3, NH4Cl should be correct. Because Ammonium (NH4) is conjugate acid of NH3 so they can form an equilibrium which is basically a buffer whose purpose is to resist pH change.

Explanation:

6 0

3 years ago