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gizmo_the_mogwai [7]
3 years ago
14

Read the following chemical equation.

Chemistry
1 answer:
AnnyKZ [126]3 years ago
5 0

The correct fraction is 2/2.

The balanced equation is

2Al + 3Cl₂ → 2AlCl₃

<em>x</em> mol AlCl₃ × (2 mol Al/2 mol AlCl₃) = <em>x</em> mol Al

The molar ratio is 2 mol Al/2 mol AlCl₃, so the fraction is 2/2.

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The sodium-potassium exchange pump
trapecia [35]

Answer: The correct answer is option E

Explanation:

Sodium/potassium pump is a mechanism that involves the movement of sodium ions (Na+) out of a cell and potassium ions (K+) into a cell, thereby regulating concentration of ions on both sides of a typical cell membrane.

In this situation, the sodium-potassium pump is usually helps in the establishment of the resting potential. The potassium voltage channels normally closes before the membrane potential is brought to a resting level.

In summary, sodium/potassium pump helps to maintain a balance in the system.

6 0
3 years ago
Neon (Ne) is in group 18. This element
Aleonysh [2.5K]

Answer:

option 3

Explanation:

Neon is one of the noble gases. Noble gases don't react with any element because of their stability. Elements of Group 18 in Periodic Table are inert gases.

8 0
3 years ago
For a particular isomer of C 8 H 18 , C8H18, the combustion reaction produces 5104.1 kJ 5104.1 kJ of heat per mole of C 8 H 18 (
vlada-n [284]

Answer:

The standard enthalpy of formation of this isomer of octane is -220.1 kJ/mol

Explanation:

Step 1: Data given

The combustion reaction of octane produces 5104.1 kJ per mol octane

Step 2: The balanced equation

C8H18(g) + 12.5 O2 ⟶ 8CO2 (g) + 9 H2O (g)  ∆H°rxn = -5104.1 kJ/mol

Step 3:

∆H°rxn = ∆H°f of products minus the ∆H° of reactants

∆H°rxn = ∆H°f products - [∆H°f reactants]

-5104.1 kJ/mol = (8*∆H°fCO2 + 9*∆H°fH20) - (∆H°fC8H18 + 12.5∆H°fO2)

∆H°f C8H18 = ∆H°f 8CO2 + ∆H°f 9H2O+ 5104.1 kJ/mol

∆H°f C8H18 = 8 * (-393.5 kJ)/mol + 9 * (-241.8 kJ/mol)] + 5104.1 kJ /mol

∆H°f C8H18 = -220.1 kJ/mol

The standard enthalpy of formation of this isomer of octane is -220.1 kJ/mol

7 0
3 years ago
Is know as a force that pulls an object weight to center of the earth
vlabodo [156]

That force would be gravity.  Gravity is what pulls any object down towards Earth due to the large mass of the Earth.

4 0
3 years ago
Read 2 more answers
What property of gases confirms that the space between the particles of gas is significantly larger than when the same substance
leva [86]
The answer is D. Compressibility
5 0
3 years ago
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