Each column is called a group.
<u>The elements in each group have the same number of electrons</u> in the outer orbital
Answer:
Molecules at a higher temperature have higher/more kinetic energy, speed, and momentum compared to molecules at a lower temperature.
Explanation:
Answer:
Direct current!
Explanation:
Process of elimination, it isn't A, it isn't C, and it definitely isn't D
Answer:
B
Explanation:
cause surface area of solute is not necessary for solution
We will use this formula for first order:
㏑[A] = - Kt +Ao
when we have t (given)= 30 min = 30 x 60 = 1800 s (we here convert time from min to second.
then we assume that the initial concentration Ao = 1
and the concentration of A (final concentration = 0.25
So by substitution:
㏑(0.25) = - K * 1800 + ㏑(1)
1.39 = K * 1800
∴ K = 0.00077 s^-1 or 7.7 x 10^-4
