0.2 mol of hydrocarbons undergo complete combustion to give 35.2 of carbon dioxide and 14.4g of water as the only product. What is the molecular formula of hydrocarbon
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Ответ:
Explanation:
Look up the relative atomic mass of
,
, and
on a modern periodic table:
Calculate the molecular mass of
and
:
Given the mass
of
and
produced, calculate the number of moles of molecules that were produced:
Calculate the number of moles of
atoms and
atoms in these
and
molecules.
EachThe combustion reaction here include two reactants: the hydrocarbon and
.
As the name suggests, hydrocarbons contain only
atoms and
atoms. On the other hand,
contains only
atoms.
Therefore, all the
and
atoms in those
and
molecules are from the unknown hydrocarbon. (With a similar logic, all the
atoms in those combustion products are from
.)
In other words, that
of this unknown hydrocarbon molecules contains:
Hence, each of these hydrocarbon molecules would contain
carbon atoms and
hydrogen atoms.
The molecular formula of this hydrocarbon would be
.
Ответ:
//hey again//
The article is correct because although vacuoles are found in both plant and animal cells, they are larger in plant cells than in animal cells.
hope this helps uwu
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