(5)
Elementary reaction:
2A --> B
Rate law:
Rate = k[A]2
(D option is correct.)
(6)
Let's say the order of the reaction is n.
Rate = k[A]n
The concentration of A double so rate is also double.
Rate' = k[2A]n = 2×Rate = 2k[A]n
2n = 2 => n = 1
(1st order reaction.)
( B option is correct.)
(7)
Density of THF = 0.889 g/mL
Mass of THF in 100.0 mL = (0.889 g/mL)(100.0 mL)
= 88.9 g = 0.0889 kg
The molar mass of dichloromethane = 147.00 g/mol
Mole of C6H4Cl2 in 11.8 g = 11.8 g/147.00 g/mol
= 0.08027 mol
Mass of solvent (THF) = 0.0889 kg
Molality = mole of solute/mass of solvent in Kg
Molality = 0.08027 mol/0.0889 kg = 0.903 m
( Molality is 0.903 m)
(A option is correct.)
(8)
Half-life (T1/2) = 57.3 minutes
Rate constant (K) = ln2/T1/2
K = ln2/57.3 minutes-1
K = 0.0121 minutes-1
( B option is correct.)
5. An elementary reaction has the form 2A → B. The rate law is Rate A)...
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