Endothermic reaction is the answer.
        
             
        
        
        
Answer: 
D
Explanation:
I think it is D. Think about it- if a human jumps, they are less than the gravitational force. But, if you are greater than the gravitational force, I think you will go into space.
 
        
             
        
        
        
Mass of aspirin = 0.025 g 
Molar mass of C9H8O4 is 180.1583 g/mol 
moles of aspirin = .025g / 180.1583 g/mol = 0.000138767 moles 
volume solution = .250 L 
molarity of the solution = 0.000138767 moles / .250L =5.551 x 10 ^-04 Moles / liter 
for aspirin i = Vant'Hoff factor = 1 particle in solution 
T = 25 + 273 =298 K 
osmotic pressure = M x R x T x i = 
5.551 x 10 ^-04 mole L -1 x 0.08206 L atm K−1 mol−1 x 298 K x 1 = 0.0136 atmospheres
        
                    
             
        
        
        
Answer: d
explanation: in both reactants and products there are 2 hydrogen and 2 chlorine atoms