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Mashutka [201]
3 years ago
15

Why does nuclear fusion occur in stars but not on Earth?

Chemistry
2 answers:
Anna11 [10]3 years ago
6 0

Answer:

C

Explanation:

disa [49]3 years ago
4 0

Answer:

C.

Fusion reactions require a lot of heat and pressure

Explanation:

nuclear fusion takes place only at extremely high temperatures. That's because a great deal of energy is needed to overcome the force of repulsion between the positively charged nuclei. ... A: Nuclear fusion doesn't occur naturally on Earth because it requires temperatures far higher than Earth temperatures.

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2Fe + 3C02<br> 3CO + Fe2O3<br> AH = -24.7 kJ<br> Is the reaction exothermic or endothermic?
Softa [21]

Answer:

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Explanation:

7 0
3 years ago
Oxalic acid, H2C2O4, reacts
Dominik [7]

Answer:0.005M

Explanation:

First deduce the oxidation and reduction half equations and from that obtain the balanced redox reaction equation. From that, the number of moles of reacting species are seen from the stoichiometry of the reaction from which the number of moles of oxalate is obtained and substituted to obtain the molar concentration of oxalate.

6 0
3 years ago
Silicon reacts with carbon dioxide to form silicon carbide sic and silicon dioxide
andrew-mc [135]

The question is incomplete, here is the complete question:

Silicon reacts with carbon dioxide to form silicon carbide and silicon dioxide. Write the balanced chemical equation.

<u>Answer:</u> The balanced chemical equation is written below.

<u>Explanation:</u>

Every balanced chemical equation follows law of conservation of mass.

A balanced chemical equation is defined as the equation in which total number of individual atoms on the reactant side is equal to the total number of individual atoms on product side.

The balanced chemical equation for the reaction of silicon and carbon dioxide follows:

2Si+CO_2\rightarrow SiC+SiO_2

By Stoichiometry of the reaction:

2 moles of silicon reacts with 1 mole of carbon dioxide gas to produce 1 mole of silicon carbide and 1 mole of silicon dioxide

Hence, the balanced chemical equation is written above.

5 0
3 years ago
I Need Help With This I’m so Confused on it.
ss7ja [257]

Answer:

<h2><em>i need help wit dat two</em></h2>

Explanation:

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3 0
3 years ago
Atmospheric pressure decreases as altitude increases. In other words, there is more air pushing down on you at sea level, and th
Gekata [30.6K]

Answer:

step 2 then step 1 then step 3 then step 4

Explanation:

First boil it. Then identify the situation which is most conducive to boiling .

While this, a liquid must overcome the attractive forces between molecules and the outside pressure pushing down on the liquid's surface.

The liquid will boil when there is weak intermolecular attraction and low atmospheric pressure.

Steps to be followed:

Pentane at high altitude

Hexane at high altitude

hexane at sea level

hexanol at sea level

8 0
3 years ago
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