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NemiM [27]
3 years ago
11

What is the main source of energy in stars?

Chemistry
2 answers:
enot [183]3 years ago
4 0

Answer:

nuclear fusion

Andrews [41]3 years ago
3 0

Answer:

<h3>Nuclear fusion. The particular type of fusion depends on the temperature, which is dictated by the mass and age of the star in question. For stars on the main sequence, the primary source is fusion hydrogen into helium via what is called the p-p (proton-proton) chain. For higher mass stars, they fuse hydrogen into helium primarily via the CNO (carbon-nitrogen-oxygen) cycle. As stars age off the main sequence, they can burn additional elements (such as helium, oxygen, silicone, etc), but these stages are much shorter.</h3>

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A balloon at 25°C has 30 L. What will the balloon's volume at 35°C?
anygoal [31]

The balloon's volume at 35°C : V₂=31.01 L

<h3>Further explanation</h3>

Given

T₁ = 25°C+273 = 298 K

V₁ = 30 L

T₂ = 35 °C + 273 = 308 K

Required

The new volume (V₂)

Solution

Charles's Law  

When the gas pressure is kept constant, the gas volume is proportional to the temperature  

\tt \dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}

Input the value :

V₂=(V₁.T₂)/T₁

V₂=(30 x 308)/298

V₂=31.01 L

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CaHeK987 [17]
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Read 2 more answers
The lowest value of the henry's law for methane gas (ch4) will be obtained with __________ as the solvent and a temperature of _
NikAS [45]

The lowest value of the henry's law for methane gas (CH₄) will be obtained with H₂O as the solvent and a temperature of  349 K.

The lowest value of the henry's law for methane gas (CH₄) will be obtained with H₂O as the solvent and a temperature of 349 K.  

Henry's law: This law states that at a constant temperature, the amount of a gas dissolved in a given type and volume of liquid is directly proportional to the partial pressure of that gas that in equilibrium with that liquid.

Mathematically it can be written as:

          C_{g}=k\times P_{g}

So, for the methane gas , lowest value of the henry's law obtained at  349 K and with H₂O as the solvent.

3 0
3 years ago
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