Answer:
5 L. 
Explanation:
From the question given above, the following data were obtained:
Initial volume (V1) = 10 L
Initial pressure (P1) = 2.5 atm
Final pressure (P2) = 5 atm
Final volume (V2) =.? 
Since the temperature is constant, we shall apply the Boyle's law equation to determine the new volume of the gas. This can be obtained as follow:
P1V1 = P2V2 
2.5 × 10 = 5 × V2
25 = 5 × V2
Divide both side by 5
V2 =25/5
V2 = 5 L
Thus, the new volume of the gas is 5 L 
 
        
             
        
        
        
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Answer:
Explanation:
Given : Density - 2.41 g/liter  
Temperature - 25° C  
Pressure : 770 mm Hg  
R = 0.0821 L atm mol-¹K-¹
  
Find : Molecular mass of gas
Solution : Ideal gas equation with respect to density will be : PM = dRT. In the formula, P is pressure, M is molecular mass, d is density, R is gas constant and T is temperature.
Keeping the values in equation-  
Pressure : 770 mm Hg = 1 atm  
Temperature : 273 + 25 = 298 K
  
M = dRT/P  
M = (2.41*0.0821*298)/1  
M = 58.96 gram/mol
Thus, the molecular mass of gas is 58.96 gram/mol.