Develop a textel adrop of water is made up of his substances. one substance is
open. the second substance is called oxygen. the smallest particles of water
o n are up of parts hydrogen and one part exygen write a formula for
the smallest part of water. stet by wing symbols for hydrogen and oxygant)

It will appear as o2(g) as a reactant 

Ithink the answer is 10.576

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