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 
.
Ideal gas is defined as hypothetical gas that fits all the assumptions of the kinetic-molecular theory. There are several assumption statement that apply to the behavior of an ideal gas, First Gases consist of larger number of tiny particles that are far apart relative to their size, Second, collisions between gas particles and between particles and container walls are elastic collision, third, gas particles are in rapid, random motion and continuous, Fourth, the temperature of a gas depends on the average kinetic energy of the particles of the gas.
Woven fabric is any textile formed by weaving. Woven fabrics are often created on a loom, and made of many threads woven on a warp and a weft. Technically, a woven fabric is any fabric made by interlacing two or more threads at right angles to one another.
It's 1. Melting a substance. The rest are chemical changes
.
.
.
of