According to the reaction equation:
Hf(aq) + H2O (l)↔ H3O+ (aq) + F(aq)
initial 1 m 0 0
-X +X +X
(1-x) X X
We assumed that [H3O+] = X
so. at eqilibrium:
Kc = [H3O] [ F] / [Hf] when we have Kc so by substitution:
3.5x10^-4 = X^2 / (1-X)
∴X^2 = 3.5x10^-4 - 3.5x10^-4 X
X^2 + 3.5x10^-4 X - 3.5x10^-4= Zero
by solving this equation:
(X-1.9x10^-2)(X + 1.9x10^-2) = Zero
∴X = 1.9x10^-2
∴ the equilibrium constatnt of H3O = 1.9x10^-2 M
Starch is a polysaccharides which is made up of a long chain of glucose. The sub units that for starch are GLUCOSE. The long chains of glucose in starch are connected by alpha 1,4 linkages. The simplest starch in existence is amylose.
24.305 g +28.08 g + 3(15.999 g)=100.382
219 g MgSIO3 (1 mole MGSIO3/100.382g)=2.181 mol MgSIO3
the answer is 2.18 mol MgSIO3
Answer:
1.80 x 10^24 atoms
Explanation:
3moles × 6.022×10^23 atoms/mole
Answer : The maximum number of electrons released = 
Explanation : Given,
Frequency = 
Kinetic energy = 
Total energy = 
First we have to calculate the work function of the metal.
Formula used :
where,
K.E = kinetic energy
h = Planck's constant = 
= frequency
w = work function
Now put all the given values in this formula, we get the work function of the metal.
By rearranging the terms, we get
Therefore, the works function of the metal is, 
Now we have to calculate the maximum number of electrons released.
The maximum number of electrons released = 
The maximum number of electrons released = 
Therefore, the maximum number of electrons released is
