Answer:
The density of the ideal gas is directly proportional to its molar mass. 
Explanation:
Density is a scalar quantity that is denoted by the symbol ρ (rho). It is defined as the ratio of the mass (m) of the given sample and the total volume (V) of the sample.
                          ......equation (1)
According to the ideal gas law for ideal gas:
                                       ......equation (2)
Here, V is the volume of gas, P is the pressure of gas, T is the absolute temperature, R is Gas constant and n is the number of moles of gas
As we know,
The number of moles: 
where m is the given mass of gas and M is the molar mass of the gas
So equation (2) can be written as:

⇒ 
⇒ 
             ......equation (3)
Now from equation (1) and (3), we get
   
⇒ Density of an ideal gas: 
   
⇒ <em>Density of an ideal gas: ρ ∝ molar mass of gas: M</em>
<u>Therefore, the density of the ideal gas is directly proportional to its molar mass. </u>
 
        
             
        
        
        
Answer: S8(s) + 8O2(g) → 8SO2(g) ΔH = -2368 kJ a.
 
        
             
        
        
        
Answer:
They are 1.204×10^24 atoms of hydrogen present in 18 grams of water. In order to calculate this,it is necessary to compute the number of hydrogen moles present in the sample.