Answer:
B
Explanation:
The debris of marine organisms such as corals, shells, and algae accumulate in the bottom of marine waters and accumulate with sediments. This debris is made up of calcium carbonate and over time the pressure and temperatures after sedimentation layers result to formation of limestone that transforms the calcium carbonate to the form of calcite.
Answer:
molarity = no. of moles of solute / 1 liter .
* one moles of sodium hydroxide = 40 gm of sodium hydroxide.
so we can said ; if want prepare 1 molar NaOH solution then we need 40 gm NaOH dissolve in one liter of water so it became one 1 molar NaOH solution
Explanation:
The hydroxide ion concentration, [OH-] = 2.439 x 10⁻¹⁰
<h3>Further explanation</h3>
Equilibrium of water and the ions :
![\tt Kc=\dfrac{[H_3O^+][OH^-]}{H_2O}](https://tex.z-dn.net/?f=%5Ctt%20Kc%3D%5Cdfrac%7B%5BH_3O%5E%2B%5D%5BOH%5E-%5D%7D%7BH_2O%7D)
Kc[H₂O] is the ion equilibrium constant for water ⇒ Kw.
The product of the concentrations of these ions (H₃O⁺ and OH⁻)at equilibrium at 25°C is 1.0 x 10⁻¹⁴ M
[H₃O⁺] [OH⁻] = 1.0 x 10⁻¹⁴ M = Kw
The hydrogen ion concentration of [H⁺]=4.1 x 10⁻⁵ M, so the hydroxide ion concentration, [OH-] :
![\tt 4.1\times 10^{-5}\times [OH^-]=1.10^{-14}\\\\(OH^-]=\dfrac{1.10^{-14}}{4.1\times 10^{-5}}\\\\(OH^-]=2.439\times 10^{-10}](https://tex.z-dn.net/?f=%5Ctt%204.1%5Ctimes%2010%5E%7B-5%7D%5Ctimes%20%5BOH%5E-%5D%3D1.10%5E%7B-14%7D%5C%5C%5C%5C%28OH%5E-%5D%3D%5Cdfrac%7B1.10%5E%7B-14%7D%7D%7B4.1%5Ctimes%2010%5E%7B-5%7D%7D%5C%5C%5C%5C%28OH%5E-%5D%3D2.439%5Ctimes%2010%5E%7B-10%7D)
Answer:
- Gravitational force
- Normal force
Explanation:
These act as the action-reaction forces.
There are two meanings to the word "Distal"
Anatomy
- situated away from the center of the body or from the point of attachment.
Geology
2. relating to or denoting the outer part of an area affected by geological activity.
