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 
.
Physical is something you can feel chemical is like a gas
Lord Kelvin, were he alive today, would be considered a Thermochemist. Thermochemistry is interested in the role of heat in chemical reactions. This includes the role of heat both as a biproduct of chemical reactions and a facilitator.
Kelvin's description of absolute zero is an important concept in thermochemistry. At absolute zero, there is no movement of molecules, and no energy available facilitate chemical reactions.
I think it is 3 because Sus wiw word if rn
They will most likey group with the second group. Since they have 6 electrons and want to have a full outer shell so therefore would group with the second group.
.
.
.
of