Which overall chemical equation is obtained by combining these intermediate equations? Upper C upper H subscript 4 plus 2 upper O subscript 2 (g) right arrow upper C upper O subscript 2 (g) plus 2 upper H subscript 2 upper O (l). Upper C upper H subscript 4 plus 2 upper O subscript 2 (g) right arrow upper C upper O subscript 2 (g) plus 2 upper H subscript 2 upper O (g). Upper C upper H subscript 4 plus 2 upper O subscript 2 (g) right arrow upper C upper O subscript 2 (g) plus 4 upper H subscript 2 upper O (g) plus 2 upper H subscript 2 upper O (l). Upper C upper H subscript 4 plus 2 upper O subscript 2 (g) right arrow upper C upper O subscript 2 (g) plus 6 upper H subscript 2 upper O (g).

The overall chemical equation obtained by combining the intermediate equations is: CH4 + 2O2 → CO2 + 2H2O

According to this question, methane gas reacts with oxygen in a combustion reaction to produce carbon dioxide and water as products.

The chemical equation for the reaction is as follows:

CH4 + O2 → CO2 + H2O

However, the equation is balanced i.e. the number of atoms of each element on both sides of the equation is not the same. We balance the equation using coefficients placed in front of the compound/element as follows:

CH4 + 2O2 → CO2 + 2H2O

Therefore, in words, the correct statement for the balanced equation is: Upper C upper H subscript 4 plus 2 upper O subscript 2 (g) right arrow upper C upper O subscript 2 (g) plus 2 upper H subscript 2 upper O (l).

Learn more about balancing chemical equations at: link

i believe the answer is three water molecules

answer is: nuclear fusion produces elements that are heavier than helium.

nuclei combine to form a heavier nucleus, releasing energy.  

for example, fusion of hydrogen atoms at the sun.  

this fusion nuclear reaction is in the inner core of the sun and hydrogen (atomic number 1) is conveted into helium (atomic number 2).  

the inner core is the central region of the sun and all solar energy is produced in the core by nuclear fusion.