Answer is: Ksp for magnesium hydroxide is 1,1·10⁻¹¹.<span>
Chemical reaction: Mg(OH)</span>₂(s) → Mg²⁺(aq) + 2OH⁻(aq).
s(Mg(OH)₂) = 1,4·10⁻⁴ M.
s(Mg(OH)₂) = s(Mg²⁺).
s(OH⁻) = 2s(Mg(OH)₂).
Ksp = s(Mg²⁺) · (s(OH⁻))².
Ksp = 1,4·10⁻⁴ M · (2,8·10⁻⁴ M)².
Ksp = 1,1·10⁻¹¹.
First, you can distinguish suspension from solution and colloid by observing whether there is solid inside. And then by using light to the mixture, if you observe the Tyndall effect, it is colloid and the other one is solution.
C , the potential energy of a 500kg boulder
Answer:
The stack would be 5.002 × 10⁷ inches high.
Explanation:
1 mole of ice cubes contains 6.022 × 10²³ cubes,
1 ice cube has a volume of 1 in³
This translates to a total volume of 6.022 × 10²³ in³
If we call the height of the stack of ice cubes we're about to produce H
The volume of ice cubes we have will take up a volume of [(3 × 10⁶)mi² × H]
Hence, we convert this area of land to in²
3 × 10⁶ mi² = 1.204 × 10¹⁶ in²
Therefore
6.022 × 10²³ = 1.204 × 10¹⁶ × H
H = (6.022 × 10²³)/(1.204 × 10¹⁶) = 5.002 × 10⁷ inches.