Locard's exchange principle implies all of the following except Soil samples can be carried from the yard into your home
Blood splatter can be used to identify blood type
O Cat hair can be transferred to your pants
O Fibers can be transferred from one person to another

Idid the calculation and i get 875,000,000 which can be written as 8.75 x 10^6?

Cis the answer ur welcome if i get it wrong u don't have to me

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na