6.81% is the percent yield when 12 g of CO2 are formed experimentally from the reaction of 0.5 moles of C8H18 reacting with excess oxygen.
Explanation:
Data given:
mass of carbon dioxide formed = 12 grams (actual yield)
atomic mass of CO2 = 44.01 grams/mole
moles of 
= 0.5
Balanced chemical reaction:
2 + 25 
⇒ 16 C + 18 
number of moles of carbon dioxide given is
number of moles = 
number of moles= 
number of moles of carbon dioxide gas = 0.27 moles
from the reaction 2 moles of reacts to produce 16 moles of C
So, when 0.5 moles reacted it produces x moles
= 
x = 4
4 moles of carbon dioxide formed, mass from it will give theoretical yield.
mass = number of moles x molar mass
mass = 4 x 44.01
= 176.04 grams
percent yield =
x 100
percent yield = 
x 100
percent yield = 6.81 %
B) 0.0035 kg
Hope this helps!
Iron is the heaviest element produced in large stars by nuclear fusion near the end of their life cycle .
<h3>What do you mean by the nuclear fusion ?</h3>
Nuclear fusion is the process by which two light atomic nuclei combine to form a single heavier one while releasing massive amounts of energy.
The main advantage of nuclear fusion is it is safe source for the generation of electricity.
Characteristics of nuclear fusion -:
- The main characteristic of nuclear fusion is that it involves formation of a singular particle from two or more atoms.
- Unlike nuclear fission, nuclear fusion is common in nature- just hard to recreate.
- Nuclear fusion typically produces few radioactive particles .
- Fusion works by applying a great deal of pressure to overcome .
Hence ,Iron is the heaviest element produced in large stars by nuclear fusion near the end of their life cycle .
Learn more about nuclear fusion ,here:
brainly.com/question/12701636
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Answer:- B- 
Explanations:- Sharing of electrons takes place between non metals and the bond formed by the sharing of electrons is known as covalent bond. In first choice we only have a zinc metal and so no sharing of electrons would be possible here.
In third choice we have NaCl. Na is a metal and Cl is a non metal. The property of metals is to transfer its valence electrons to the non metal and the bond formed is known as ionic bond. So, third choice is also not correct.
In choice B we have sulfate ion that has sulfur and oxygen atoms and both of these are non metals. So, sharing of electrons is present here between the S and O atoms and covalent bonds are formed.
So, choice B- is the right answer.
<span>Anthropology is a science which studies human study of both in terms of culture, behavior, diversity, and so forth. Anthropology is a term word comes from the Greek word anthropos and logos. Anthropos meaning human and logos means story or word.
The object of anthropology is human in society ethnicity, culture and temperament. The science of anthropology has the purpose to study the human being in society tribes, behaved and cultured to build community itself<span>.</span></span>
