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Gennadij [26K]
3 years ago
5

1. How does a star's life begin?

Chemistry
2 answers:
Damm [24]3 years ago
5 0

Answer:

Read Below! :)

Explanation:

A star begins it's life cycle as a nebula, or rather, a cloud of dust and gas! Turbulence deep within these clouds of gas, causes knots to form. The gas and dust begin to collapse under its own gravitational attraction. As the cloud collapses, the material at the centers begins to heat up, forming a protostar!

Hope this helps! :)

Phantasy [73]3 years ago
4 0

Answer:

A star begins its life as a cloud of dust and gas (mainly hydrogen) known as a nebula. A protostar is formed when gravity causes the dust and gas of a nebula to clump together in a process called accretion. ... If a critical temperature in the core of a protostar is reached, then nuclear fusion begins and a star is born.

Explanation:

.

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A chemist reacted 11.50 grams of sodium metal with an excess amount of chlorine gas. The chemical reaction that occurred is show
iren [92.7K]

Actual yield is the definite mass of the product obtained from the reaction. The actual yield of the reaction is 24.83 gms.

<h3>What is the percentage yield?</h3>

Percentage yield is the proportion of the actual to the theoretical yield. The formula is given as,

% yield = Actual yield ÷ Theoretical yield × 100

The balanced chemical reaction is given as:

2 Na + Cl₂ → 2NaCl

From the reaction:

2 × 23 Na = 2 × 58.44 gm of NaCl

If, 1 gm of Na will produce = (2 × 58.44) ÷ (2 × 23)

Then, 11.50 gms sodium will produce, (2 × 58.44) ÷ (2× 23) × 11.50

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So, the actual yield is calculated as:

= % yield × Theoretical yield ÷ 100

= 85 × 29.22 ÷ 100

= 24.83 g

Therefore, the actual yield of the reaction is 24.83 gms.

Learn more about actual yield here:

brainly.com/question/22257659

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