Javier kicks soccer balls with different amounts of air to see which will travel further. He kicks each ball three times as hard as he can and his
friend measures how far each kick went. What is the dependent (outcome) variable?

Nonmetals usually react by gaining electrons

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

The answer is d.potassium

The velocity would be 2