A detective was trying to determine the identity of three unknown substances. He knew that the substances could be one of the following: MgCl2, NaNO3, and AgBr. To figure out the identities he decided to find the mass of each bag and compare them to the molar mass of the three substances. Will he be able to determine the identity of the unknown substances with this procedure? Justify your answer.

Compound with sulfer  is bright red 

The answer you are looking for is option d

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