<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>
<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

<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
</em>
<em>
which 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>
Answer: carbon dioxide was replaced with oxygen
Explanation:Comparison of Earth's prebiotic and modern atmospheres. Before life began on the planet, Earth's atmosphere was largely made up of nitrogen and carbon dioxide gases. After photosynthesizing organisms multiplied on Earth's surface and in the oceans, much of the carbon dioxide was replaced with oxygen