Magine that Kevin can instantly transport himself between Planet X and Planet Y. Which statement could be said about Kevin in this situation? A. Kevin’s weight may change between Planet X and Planet Y.
B. Kevin’s volume may change between Planet X and Planet Y.
C. Kevin’s mass may change between Planet X and Planet Y.
D. Kevin’s matter may change between Planet X and Planet Y.

Ans(15) minutes;

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

Burned piece of steel wool does not gain mass. so only d could be true.