Answer:
each continent shifts 2-5 inches per year so once it was joined then it is what it is now.In a million years again it will comes closer and wjo knows what will happen.moutains will be formed as the tectonic plates will collide.
Explanation:
From the question it can be infered that initially only parent atoms were present in the rock and no daughter atom. So, initially there was only uranium atom and no lead atom. So, in total there were 500+1500= 2000 uranium atom. And no lead tom was there.
175.8 g NaCl to moles:
(175.8 g)/(58.44 g/mol) = 3.008 mol NaCl
Molarity = moles of solute/volume of solution in liters
(3.008 mol NaCl)/(1.5 L) = 2.0 M.
The molarity of this solution would be 2.0 M.
Answer:
A sentence is something that you can type up.
For example: I saw a dog that was hungry and needed something to drink so I took it home gave it some water and some food.
I typed this up and did not look it up.
Explanation:
Part 1: Calculate the percent ionization of 0.0075 m butanoic acid (Ka=1.5x10^-5)
C4H8O2(aq) +H2O(l) → C4H7O2(aq) + H3O +
initial 0.0075 0 0
change -X +X +X
final 0.0075-X X X
when Ka is relative smaller to the intial concentration of the acid so we can assume that 0.0075-X≈ 0.0075 by substitution in Ka formula:
Ka = [C4H7O2][H3O+] / [C4H8O2]
1.5x10^-5 = X*X / 0.0075
X^2 = 1.125x10^-7
X= 0.00034 m =3.4 x 10 ^-4 m
∴ [C4H7O2] = [H3O+] = 3.4X10^-4
∴ percent ionization = [H+ equlibrium]/[acid initial] *100
= 3.4X10^-4/0.0075 * 100
= 4.5 %
part 2) calculate the percent ionization of 0.0075m butanoic acid in a solution containing 0.085m sodium butanoic?
C4H8O2(aq) + H2O(l) ↔ C4H7O2(aq) + H3O+
initial 0.0075 0 0.085
change -X +X +X
final 0.0075-X X 0.085+X
we can assume that 0.0075-X≈ 0.0075 & 0.085+X ≈ 0.085
∴Ka = (X*(0.085)) / (0.0075)
(1.5x10^-5)*0.0075 = 0.085X
∴X = 1.3x 10^-6
∴ percent ionization = (1.3x10^-6)/0.0075 * 100 = 0.017 %