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SpyIntel [72]
3 years ago
15

Use the periodic table to correctly describe the arrangement of electrons in an oxygen atom. Check all of the

Chemistry
2 answers:
goblinko [34]3 years ago
8 0

Answer:

It's the second and the second to last

Explanation:

Anna [14]3 years ago
6 0

Answer:

second option and last option

Explanation:

Know how to do an electron configuration. This is correct because it adds up to 8 and is in the correct order.

All valence electrons are in the last shell. In this case, 2p is the last shell.

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At body temperature (37°C), the rate constant of an enzymecatalyzed decomposition is 2.3X10¹⁴ times that of the uncatalyzed reac
schepotkina [342]

The activation energy is lowered by 85351.23 J/mol.

<h3>What is the activation energy?</h3>

The activation energy is the energy that is used to start a reaction.

In K = (In A) - (Ea / RT)

In K = (-Ea / RT) + In A

Where k = the activity constant

Ea = activation energy

R = molar gas constant

T = absolute temperature in Kelvin

In K₁ = (-Ea₁ / RT) + In A (eqn 1)

At point 2 with the catalyst

In K₂ = (-Ea₂ / RT) + In A (eqn 2)

Note that the molar gas constant, the absolute temperature in Kelvin, and the activity constant are all the same for both points.

Subtract (eqn 1) from (eqn 2)

In K₂ - In K₁ = (-Ea₂ / RT) - (-Ea₁ / RT) + In A - In A

In (K₂ / K₁) = (1/RT) (Ea₁ - Ea₂)

We were told that K₂ / K₁ = 2.3 × 10¹⁴, then find the difference in Ea

R = 8.314 J/mol.K, T = 37°C = 310.15 K

In (2.3 × 10¹⁴) = (1/ (8.314×310.15) (Ea₁ - Ea₂)

33.1 = (1/2578.5871) (Ea₁ - Ea₂)

(Ea₁ - Ea₂) = 33.1 × 2578.5871 = 85351.23 J/mol

Thus, the enzyme that lower the Ea is 85351.23 J/mol.

To learn more about activation energy, refer to the below link:

brainly.com/question/15114573

#SPJ4

8 0
2 years ago
Why could a diet low in carbohydrates be dangerous?
mario62 [17]
A_The body could break down proteins from muscles for energy.
3 0
3 years ago
Crystal structures with ions must have ____________.a. a positive chargeb. a negative chargec. electrical neutralityd. a 2+ char
Inessa05 [86]

Answer:

c. electrical neutrality.

Explanation:

A <em>crystalline  solid</em><em> possesses a rigid and long-range order; its atoms, molecules, or ions occupy  specific positions.</em> The arrangement of such particles in a crystalline solid is such that  the net attractive intermolecular forces are at their maximum.

Ionic crystals, particularly, have two important characteristics:

(1) They are composed of charged species.

(2) Anions and cations are generally quite different in size.

The forces holding the atoms together are electrostatic attractions. Examples of these types of crystals include NaCl, LiF, MgO, CaCO₃.

<u>Since they are composed of anions and cations, in stoichiometric amount, they are to be said electrically neutral.</u>

8 0
3 years ago
Iron atoms have been detected in the sun's outer atmosphere, some with many of their electrons stripped away. what is the net el
shtirl [24]
For a proton, the charge is represented by +e
For an electron, the charge is represented by -e
The charge of an electron [e] is equal to the - 1.602 * 10^-19 Coulombs
For an ionized atom, the net charge is equal to the sum of charges in the proton and the electron in that atom.
From the question, we are told that, the iron atom has 26 protons and 7 electrons.
The net charge Q = 26 [ +e] + 7 [- e] = +19 e
+19 e = + 19 [1.602 * 10^-19 C] = + 3.04 * 10^-18 C.


3 0
3 years ago
mixture or pure substance: 1.blood 2.dyes 3.self-raising flour 4.muesli 5.copper wire 6.distilled water 7.table salt 8.milk 9.br
jenyasd209 [6]

Answer: Mixture: Blood , Self raising flour,muesli ,dyes, milk, tea, air, bronze

Pure substance: Copper wire, distilled water, table salt, oxygen.

Explanation:

Mixture is a substance which is made up two or more number of compounds which chemically inactive and retain their distinct chemical properties.

Blood , Self raising flour,muesli ,dyes, milk, tea, air, bronze

Pure substance is defined as anything with uniform and unchanging composition is known s pure substance.

Copper wire, distilled water, table salt, oxygen.

5 0
3 years ago
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