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VashaNatasha [74]
3 years ago
13

Why do you think there are different stars in each nighttime section of the artifact?

Chemistry
1 answer:
chubhunter [2.5K]3 years ago
7 0

Answer:

The sky looks different in each nighttime section of the artifact because the artifact sections represent different seasons. ... Different constellations are visible on different nights throughout the year because of the earth's orbit. The Earth orbits around the sun. A full orbit is 365 days or one year.

Explanation:

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how many atoms of oxygen are contained in 47.6g of Al2(CO3)3? The molar mass of Al2(CO3)3 is 233.99g/mol.
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<span>Moles of aluminum carbonate = Mass / Molar mass = 47.6 g / 233.99 g molâ’1 =0.203 mol To find moles of oxygen: In each mole of the carbonate there are 9 moles of oxygen And thus there are 9 Ă— 0.203 moles of oxygen in the given quantity. = 1.83 moles of oxygen Within one mole of oxygen, we have 6.022 x 10^23 atoms Amount of atoms within 1.827 moles of oxygen = 1.83 x 6.022 x 10^23 = 1.10 x 10^24 atoms</span>
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4 years ago
Which of the following statements about nuclear reactions is true?
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<u>Answer</u>:   They follow Einstein's equation, which allows for the conversion of mass to energy.

<em>The statement that is true about nuclear reactions is that they follow Einsteins equation which allows the conversion of mass to energy. </em>

<u>Explanation:</u>

<em>Einstein’s mass-energy equation gives the idea that energy and mass are two inter-convertible forms of the same thing.</em> This equation clearly answers the question about the large amount of energy produced by produced in nuclear reaction even though they don’t involve very heavy atoms. It is given by  

E=mc^2

<em>Energy released by a mass is equal to mass times the square of speed of light c. </em>

<em>Value of speed of light c=3 \times 10^8 .</em>

<em>c^2=9 \times 10^1^6which is a large value.</em>  

Thus high amount of energy can be produced by even a small mass. It is the mass of the reacting species in a nuclear reaction that gets converted to energy and <em>the sum of mass and energy in the overall reaction is always conserved. </em>

3 0
4 years ago
Please help really soon<br> (I'm confused) :|
Yanka [14]

Answer: carbon dioxide was replaced with oxygen

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