1: it is +2
2: it is +6
(Make this brainliest answer please)
Answer:
Explanation:
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In this case, according to the given chemical reaction:
CaCO3(s)→CaO(s)+CO2(g)
In which the amounts are unfortunately given, we can however, assume the information of similar problems so you can further modify the numbers but follow the same work:
CaCO3 = 25.3 g
CaO = 14.9 g
CO2 = 33.7 g
Thus, since just CO2 is involved on the equilibrium expression because CaCO3 and CaO are solid, we can compute the moles of the CO2 at equilibrium and further compute the concentration in the 9.0-L vessel:
Thus, we proceed with the equilibrium expression to obtain:
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Answer:
In 12.6g of there are 0.29 moles of and molecules of
Explanation:
First you should find the molar mass of the :
Then you should write the conversion factor using the molar mass:
So, there are 0.29 moles of in 12.6g of .
Finally to find the number of molecules, you should use the Avogadro´s number:
There are moles of in 12.6g of
Understanding the unified structure of atoms helps you better understand an element that was unfamiliar because just by knowing the structure of the atom you can get a basic idea of the element.
if you were able to know the number of protons, electrons, and neutrons you would be able to know the atomic number and mass of the unfamiliar element.
understanding the unified structure of the atoms allows a person to understand why this element has the properties it has and is able to learn more about the element by conducting certain tests to see how the electrons,protons, and neutrons act.
understanding the unified structure of atoms allows you to better understand the unfamiliar element because you have a better understanding of what makes up the unfamiliar elements and the structure of the element.
by understanding the unified structure of atoms you can learn more about the overall structureand reactivity of the element by understanding the structure of the atoms within the element.