Two. The zero before the decimal is insignificant
        
             
        
        
        
Answer:
25.42 atm
Explanation:
Data Given:
Volume of a gas ( V )= 2.00 L
temperature of a gas ( T ) =  310 K
number of moles (n) = 2 mol
Pressure of a gas ( P ) = to be find 
Solution:
Formula to be used
               PV= nRT
Rearrange the above formula
               P = nRT / V . . . . . . . . . . (1)
Where R is ideal gas constant
R = 0.08205 L atm mol⁻¹ K⁻¹
Put values in equation 1
                   P = nRT / V 
                   P = 2 mol x 0.08205 L atm mol⁻¹ K⁻¹ x 310 k / 2 L
                   P = 50.84 L atm / 2 L
                   P = 25.42 atm
 P ressure of gas (P) will be = 25.42 atm
 
        
             
        
        
        
Heat energy can be calculated by using the specific heat of a substance multiplying it to the mass of the sample and the change in temperature. It is expressed as: 
<span>Energy = mCΔT
</span><span>Energy = 59.7 (0.231) (100-25)
</span><span>Energy = 1034.30 J</span>
        
             
        
        
        
Hi!
• For this you want to convert moles to grams
• To do this you would simply multiple your moles times the atomic mass of potassium
3.25 x 39.098= 127.0685 
• So your answer for this should be about 127.07 depending on how you need to round!