Answer:
136
Explanation:
The Mass Number is the combination of the amount of Protons and Neutrons in an element, so if the total mass is 222, and the amount of protons is 86, then you can do 86 + x = 222 to find that x is equal to 136
A
The iron corrodes so it oxidized
0.0010 mol·L⁻¹s⁻¹
Assume the rate law is
rate = k[A][B]²
If you are comparing two rates,
You are cutting each concentration in half, so
Then,