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4 years ago

The universe cooled after the Big Bang. At some point, hydrogen atoms combined to form helium. What is this process called?

Chemistry

2 answers:

Georgia [21]4 years ago

8 0

Answer: fusion

Explanation:

Nuclear fusion is a process which involves the conversion of two small nuclei to form a heavy nuclei along with release of energy.

$4_1^1\textrm{H}\rightarrow _2^4\textrm{He}+2_{+1}^0\textrm{e}+\text{energy}$

Nuclear fission is a process which involves the conversion of a heavier nuclei into two or more small and stable nuclei along with the release of energy.

Red shift is a phenomenon where electromagnetic radiation from an object undergoes an increase in wavelength.

Nuclear decay is a type of process in which a less stable nuclei decomposes to a stable nuclei by releasing some radiations or particles like alpha, beta particles or gamma-radiations.

Lunna [17]4 years ago

6 0

A) nuclear fusion is the answer

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Ivahew [28]

Both theoretical and actual yields would be needed to calculate percent yield.

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2 years ago

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3 years ago

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myrzilka [38]

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3 years ago

a 0.784 g sample of magnesium is added to a 250 ml flask and dissolved in 150ml of water. magnesium hydroxide obtained from the

Svetach [21]

The chemical reaction involving Mg(OH)2 and HCl is:

So we see that for every 2 moles of HCl, 1 mole of Mg is reacted.

Calculating for moles HCl:

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The moles Mg then is:

moles Mg = 0.0645 mol * (1 / 2)

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