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STatiana [176]
3 years ago
6

What causes a star to shine brightly

Chemistry
1 answer:
asambeis [7]3 years ago
6 0

Answer:

Stars shine because they are extermly hot of light .The source of their energy is niclear reactions going on deep inside the stars.

Explanation:

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What does composing mean?
levacccp [35]

Answer:

Composing  \: means \:  to  \: come \:  together \:  to  \:  \\ form  \: or  \: make  \:  something.

Explanation:

Thank you!!!!

4 0
3 years ago
Read 2 more answers
Two scientists wrote a paper detailing their research and conclusions and submitted it to a scientific journal. Several months l
Semmy [17]
<span>Two scientists wrote a paper detailing their research and conclusions and submitted it to a scientific journal. Several months later, they received the paper back from the publisher with many comments attached from several fellow scientists. It is either that they revise their study or replicate the study. Most scientists would revisit their work and the findings they had from their research. Most probable if they were successful and the comments of the publisher and the co-scientists were positive they could replicate the study to validate its accountability.<span>
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6 0
3 years ago
The standard free-energy changes for the reactions below are given. Phosphocreatine → creatine + Pi ∆ G'° = –43.0 kJ/mol ATP → A
Jet001 [13]

Answer:

-12.5 kJ/mol

Explanation:

The free-energy predicts if a reaction is spontaneous or not. If it is, ΔG < 0. When a reaction happens by steps, the free-energy of the global reaction can be calculated by the sum of the free-energy of the steps (Hess law). If it's needed to operations at the reaction the same operation must be done in the value of ΔG (if the reaction is inverted, the signal of ΔG must be inverted).

Phosphocreatine → creatine + Pi ∆G'° = –43.0 kJ/mol

ATP → ADP + Pi                             ∆G'° = –30.5 kJ/mol (x-1)

--------------------------------------------------------------------------------------

Phosphocreatine → creatine + Pi ∆G'° = –43.0 kJ/mol

Pi + ADP → ATP                             ∆G'° = 30.5 kJ/mol

The bold compounds are in opposite sides, so they'll be canceled in the sum of the reactions:

Phosphocreatine + ADP → creatine + ATP

∆G'° = -43.0 + 30.5

∆G'° = -12.5 kJ/mol

5 0
3 years ago
16 Which two gases can not be broken down by chemical means?(1) CO and He (3) Xe and He
lyudmila [28]
The answer is (2) CO and NH3. The chemical reaction can only break down chemical bonds between atoms inside the molecule. The He and Xe is consists of one atom only, so they can not be broken down by chemical means.
4 0
3 years ago
Find the pH of a solution whose H+ concentration is 1.8 x 10-12​
frutty [35]

Answer:

11.74

Explanation:

The formula to find the pH of a solution is..

pH = -log [H⁺]

pH = -log [1.8×10¹²]

pH = 11.74

The answer would be to 2 decimal places because the concentration is two significant digits.

8 0
3 years ago
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