The correct answer I believe is sunlight
Ruler is the answer of this question
Answer:
The molecular weight is 
Explanation:
From the question we are told that
The mass of the sample is 
The temperature is 
The volume which the gas occupied is 
The pressure is 
Generally from the ideal gas equation we have that

Here n is the number of moles of the gas while the R is the gas constant with value 

=> 
=> 
Generally the molecular weight is mathematically represented as

=> 
=> 
The number of protons in the nucleus of the atom is equal to the atomic number (z) and the number of electrons in a neutral atom is equal to the number of protons