Use the information below to calculate the ∆H for this reaction: NaOH(s) + HCl(g) → NaCl(s) + H2O(g) AHreactants = -519.0 kJ/mol AHproducts = -652.8 kJ/mol O +133.8 kJ/mol 0 -133.8 kJ/mol 0 -1171.8 kJ/mol O +1171.8 kJ/mol​

The answer is falsegravitational force is independent of medium and depends only on the masses of the two objects and the distance between them.

Ansaquatic plants;  

Reaction involved in present system is :   c12h22o11 + h2o → 2 c6h12o6the reaction system is obeying following rate law:   rate = k[c12h22o11]thus, it is a first order reaction.now, for 1st order reactionrate constant (k) =  given: initial conc. = 3.0 g, final conc. = 2.7 g, t = 2.5 h∴rate constant (k) =  ∴ k = 0.04215 h-1now, for 1st order reaction, half life = 0.693/k = 0.693/0.04215 = 16.4 hthus correct answer is option b