Which of these mole ratios is possible for this reaction? 4p 5o2 → 2p2o5
4: 5
2: 1
1: 2
5: 2

The answer is 4:5

Explanation:

First we must verify that the equation is balanced, for that, we write the equation:

4P + 5O2 = 2P2O5

It is the formation equation of phosphorus oxide V, it is a synthesis reaction. It is observed in the equation that 4 moles of phosphorus react with 5 moles of oxygen to form 2 moles of phosphorus oxide V, therefore there is a molar ratio between phosphorus and oxygen of 4 to 5 (4:5).

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.