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3 years ago

One of the reasons that stars are so large is because _____.

Chemistry

2 answers:

nadezda [96]3 years ago

8 0

Answer:

Best answer a.) pressure builds to heat the gases

Explanation:

A star is made up a massive ball of hot gas, large enough that gravity causes it to implode on itself forming a very dense and hot core that then causes nuclear fusion, whereby larger atoms are formed from the combination of much smaller ones, in the process a lot of heat and pressure is generated that then in turn pushes outwards from the core making it larger.

ValentinkaMS [17]3 years ago

4 0

Answer:

They are composed of hydrogen and helium

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The number of neutrons and protons in the nuclei of two atom A and B is as follow: [A] proton= 8 and neutron = 8, [B] proton = 8

sveticcg [70]

A.atomic mass(a)=16
atomic mass(b)=18
b.a and b are isotopes
c.(a)=2,6
(b)=2,6

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3 years ago

4. A galvanic cell is formed when two metals are immersed in solu- tions differing in concentration 1 when two different metals

emmasim [6.3K]

A galvanic cell is formed when two metals are immersed in solutions differing in concentration 1 when two different metals are immersed.

<h3>What is galvanic cell?</h3>

A galvanic cell is an electrochemical device that transforms chemically generated free energy into electrical energy. A photogalvanic cell produces photochemical species that react to produce an electrical current when connected to an external circuit.

<h3>How does galvanic cell works?</h3>

In order to create a pathway for the flow of electrons via this wire, the galvanic cell makes use of the ability to split the flow of electrons during the processes of oxidation and reduction, forcing a half-reaction and linking each with a wire.

An electrochemical device known as a galvanic cell converts chemical energy from a spontaneous redox response into electrical energy. It possesses an electrical potential of 1.1 V. The anode, which is a negative plate in galvanic cells, is where oxidation takes place. It is a positive plate where lessening takes place.

To learn more about galvanic cell visit:

brainly.com/question/13031093

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8 0

1 year ago

What is the frequency of light that has an energy of 3.98 x 10-18 J

Dominik [7]

This is what i have found i hope this helps

8 0

2 years ago

On the reaction below, label the BSA, BSB, CA, and CB. CH3COOH + H2O → CH3COO– + H3O+

Ostrovityanka [42]

Answer:

Acid(BSA) = CH₃COOH

Base (BSB) = H₂O

Conjugate base (CB) = CH₃COO⁻

Conjugate acid (CA) = H₃O⁺

Explanation:

Equation of reaction;

CH₃COOH + H₂O → CH₃COO⁻ + H₃O⁺

Hello,

From my understanding of the question, we are required to identify the

1) Acid

2) Base

3) conjugate acid

4) conjugate base in the reaction

Acid (BSA) = CH₃COOH

Base (BSB) = H₂O

CA = conjugate acid = H₃O⁺

CB = conjugate base = CH₃COO⁻

7 0

2 years ago

If the temperature of a gas is increased from 20°C to 35°C, what is the new pressure if the original pressure was 1.2 atm? Assum

Marta_Voda [28]

Answer:

B.) 1.3 atm

Explanation:

To find the new pressure, you need to use Gay-Lussac's Law:

P₁ / T₁ = P₂ / T₂

In this equation, "P₁" and "T₁" represent the initial pressure and temperature. "P₂" and "T₂" represent the final pressure and temperature. After converting the temperatures from Celsius to Kelvin, you can plug the given values into the equation and simplify to find P₂.

P₁ = 1.2 atm P₂ = ? atm

T₁ = 20 °C + 273 = 293 K T₂ = 35 °C + 273 = 308 K

P₁ / T₁ = P₂ / T₂ <----- Gay-Lussac's Law

(1.2 atm) / (293 K) = P₂ / (308 K) <----- Insert values

0.0041 = P₂ / (308 K) <----- Simplify left side

1.3 = P₂ <----- Multiply both sides by 308

3 0

11 months ago