Answer:
13.53 kJ
Explanation:
The energy of a gas can be calculated by the equation:
E = (3/2)*n*R*T
Where n is the number of moles, R is the gas constant (8.314 J/mol.K), and T is the temperature.
E = (3/2)*3.5*8.314*310
E = 13,531.035 J
E = 13.53 kJ
 
        
             
        
        
        
Repeatable 
If it’s repeatable and you get the same answer constantly then it’s a good and accurate experiment
        
             
        
        
        
1Hz = 1 cycle per second
19 cycles / .5 seconds = 38Hz
        
             
        
        
        
The answer is (1) Arrhenius acid and an electrolyte. The HNO3 is a H+ ion donor and OH- receptor. Electrolyte means the compound will release ion when dissolving in suitable ionized solution.