Hey there!
1 mol is 6.022 x 10²³ formula units.
To find the amount of formula units in 5.81 mol of BaCl₂, we need to multiply the amount in 1 mol by 5.81.
5.81 x 6.022 x 10²³
35.0 x 10²³
3.40 x 10²⁴
There are 3.4 x 10²⁴ formula units in 5.81 mol BaCl₂.
Hope this helps!
[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
Answer is 120
Explanation
X is total
if 25% were boys. Then .25x = 40
Divide both sides by .25
X = 160
Total- boys = girl dogs
160-40 = girl dogs
120= girl dogs
Have a nice day. Hope this is helpful.
Answer:
If a linear graph has a negative slope then dependent value decreases in value as the independent variable increases. The line with negative slope is sloping down to the right