[H+] for HClO(this is a weak acid so it requires an I.C.E. table to solve):
(I=initial amount. C=change in amount. E= amount at equilibrium.)
I.C.E. table
HClO. H2O. >>> H3O+ ClO4-
I. 0.100M. N/A. 0. 0
C. -x. N/A. +x. +x
E. 0.1-x. N/A. x. x.
(we don't consider water because it is not an aqueous solution)
ka=(x^2)/(0.1-x)
(2.9×10^-8)= (x^2)/(0.1-x)
(0.1-x)(2.9×10^-8) = x^2
(3.0×10^-9) - ((2.9×10^-8)x) = x^2
x^2+(2.9×10^-8)x-(3×10^-9)
a=1
b=(2.9×10^-8)
c= -(3×10^-9)
plug those values into the quadratic formula:
x= (-b +(√((b^2)-4ac))))/2a
I got x= 0.000053837
x= [H+] =0.000053837
[H+] for 0.100 M HClO4:
because HClO4 is a strong acid, it dissociates completely. Meaning that it's [H+] =0.1
sun‘s life cycle
1. nebula
2. protostar
3. sequence star (sun is this currently)
4. red giant
5. white dwarf
6. black dwarf
bigger stars
1. nebula
2. protostar
3. sequence star
4. red super giant
5. supernova
6a. black hole
or
6b. neutron star
Sun was a protostar
is currently a main sequence star
will remain so for another 4-5 billion years.
It will then expand and cool to become a red giant
after which it will shrink and heat up again to become a white dwarf
The white dwarf star will run out of nuclear fuel and
slowly cool down over many billions of years
black dwarf
BBC
https://www.bbc.co.uk/bitesize/guides/zwv8xfr/revision/1
Answer:
= 2.659 g NaCl
Explanation:
Molarity of a substance is given by the formula;
Molarity = moles/Volume in liters
Thus;
Number of moles = Molarity × volume in liters
= 1.3 M × 0.035 L
= 0.0455 Moles
But, the molar mass of NaCl is 58.44 g/mol
The mass of NaCl is therefore;
= 0.0455 g × 58.44 g/mol
<u>= 2.659 g NaCl</u>
Answer:
hi
Explanation:
i think 63.55 g
hope it helps have a nice day
good bye: )