4. [A] = 5[A]0
v = 5v0
v = k× [A]^nA
v0 = k×(5[A]0)^nA
v/v0 = k×[A]^nA/k×(5[A]0)^nA
v/5v0 = [A]^nA/5^n×[A]0^nA
1/5 = 1/5^nA => nA = 1
b) t1/2 = ln2/k => k = ln2/t1/2 = ln2/1386 = 5×10^-4
c) v = k×[A] = 5×10^-4 × 2×10^-1 = 10^-4 mol/L×s
La 3 ma incurc in calcule..
