Answer:
.
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.
- Each molecule contains one atom. Therefore, that
of 
contains 
of 
atoms. - Each molecule contains two atoms. Therefore, that of
contains 
of 
atoms.
The 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 
.
Answer:
big bang → expansion and cooling → atom formation → star and galaxy formation → continuation of expansion and cooling
Explanation:
Well you see its part sodium and sodium is another word for salt so It is a salt because it is formed by the reaction of an acid and a base
ok thank you for elaborating and you are correct in a neutralization reaction the reactants are the acid and base. the salt and water would be the product and the two elements could be anything meaning that it is most likely a mixture
Hope this helps
.
.
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of