<span><span>4.2×1022</span>NA</span><span> N_{A} is the avagadro number</span>
Answer:
Explanation:
57.1 g of oxygen combines with 42.9 g of carbon
57.1/16 atoms of oxygen combines with 42.9 / 12 atoms of carbon
3.56 atoms of oxygen combines with 3.575 atoms of carbon
one atom of oxygen combines with one atom of carbon
A appears to be CO ( carbon monoxide gas )
2 )
72.7 g of oxygen combines with 27.3 g of carbon
72.7 / 16 atoms of oxygen combines with 27.3 / 12 atoms of carbon
4.54 atoms of oxygen combines with 2.275 atoms of carbon
2 atoms of oxygen combines with 1 atom of carbon
B appears to be CO₂ ( Carbon dioxide)
The name given to the group delimited in the image is ethyl.
<h3>What is ethyl?</h3>
It is a hydrocarbon from the alkyl functional group.
Ethyl is a substituent derived from ethane. The formula for ethane is
, whereas, ethyl has one H less than ethane.
Thus, the formula for ethyl is
.
Looking at the delimited portion of the image, 2 C atoms in C-C bond are bonded by 5 H atoms.
More on alky groups can be found here: brainly.com/question/15942698
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Answer:
In a chemical reaction the total mass of all the substances taking part in the reaction remains the same. ... The law of conservation of mass states that the total mass of substances taking part in a chemical reaction is conserved during the reaction.
Explanation:
The correct answer is Hydroelectric (D)