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:
Tetrahedral
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C. the rock may have diferrent textures
The person would look B) in the nucleus.
Hope this helps!
-Payshence xoxo
Answer:
102g of crystals
Explanation:
When the Cr(NO₃)₃⋅9H₂O is dissolved in water at 15°C, the maximum mass that water will dissolve in the equilibrium is 208 g per 100g of water. When you heat the water, this mass will increases.
In this problem, at 35°C the water dissolves 310g in 100g of water, as in the equilibrium at 15°C the maximum mass is 208g, the mass of crystals that will form is:
310g - 208g = <em>102g of crystals</em>
<em>-Crystals are the Cr(NO₃)₃⋅9H₂O that is not dissolved-.</em>
I hope it helps!