Answer:
Explanation:
First write all numerators above the common denominator
4/5 - 1/2 - 1/2=
- 1/2
Subtract the numbers
- 1/2 =
-
Write all numerators above the least common denominator 10
- =
Subtract the numbers and you got your answer :)
<u>Ans: Volume of stock H2SO4 required = 6.94 ml</u>
<u>Given:</u>
Concentration of stock H2SO4 solution M1 = 18.0 M
Concentration of the final H2SO4 solution needed M2 = 2.50 M
Final volume of H2SO4 needed, V2 = 50.0 ml
<u>To determine:</u>
Volume of stock needed, V1
Explanation:
Use the dilution relation:
Answer:
-aluminum
Explanation:
Last one is the correct answer
The balanced reaction equation:
M(OH)2 ↔ M^2+ + 2(OH)^-
and when the Ksp = [M^2+][OH-]^2
when PH + POH = 14
∴ POH = 14-10.3= 3.7
and when POH = - ㏒ [OH-]
3.7 = -㏒[OH-]
∴[OH] = 2x10^-4
and when [M^2+] = 1/2[OH-]
∴[M^2+] = (2x10^-4) / 2 = 0.0001 M
So, by substitution in Ksp formula:
∴Ksp = (0.0001 * (2x10^-4)^2 = 4x10^-12
<span>Temperature causes water molecules to move more quickly, because each individual molecule has more energy as it gets hotter .
So, the answer is A.
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