Which of the following groups and oxidation numbers is incorrect Group 18,0
Group 13,-5
Group 1,+1
Group 17,-1

Change in speed or direction : )

Ithink the answer is b.

Using dilution equationm1v1 =m2v2 ; where m1 and m1 are the intiial and final concentration, and v1 and v2 are the initial and final volume.5  × 5 m = 8 l  × m2m2 = 25/8 = 3.125 mtherefore; the resulting molarity is 3.125 m

Ans(15) minutes;