Answer:
pH = 12.65
Explanation:
From the given information:
number of moles =mass in gram / molar mass
number of moles of KOH = mass of KOH / molar mass of KOH
number of moles of KOH = 0.251 g / 56.1 g/mol = 0.004474 mol
For solution :
number of moles = Concentration × volume
concetration = number of moles/ volume
concetration = 0.004474 mol / 0.100 L
concetration = 0.04474 M
We know that 1 moles KOH result into 1 mole OH⁻ ions
Therefore, Molarity of OH⁻ = 0.04474 M
Now,
pOH = -log[OH⁻]
pOH = -log (0.04474) M
pOH = 1.35
Similarly,
pH + pOH = 14
pH = 14 - pOH
pH = 14 - 1.35
pH = 12.65
Answer:
In order to balance the chemical equation, you need to make sure the number of atoms of each element on the reactants side is equal to the number of atoms of each element on the product side. In order make both sides equal, you will need to multiply the number of atoms in each element until both sides are equal.
Hope this helped you.
Answer (AR)
Explanation: mn has an atomic number of 25 . Simplify use this information to obtain its electronic configuration . MN 1s2 2s2 2p6 3s2 3p6 4s2 3d5
Answer:
1
Explanation:
single displacement replaces one element with another and it's product is a pure element.
The correct answer is C. Living things are composed of cells.
Explanation:
A conclusion is an idea derived from information, this idea or statement often summarizes the information or indicates the result of this. In the case of the studies by Schwann and Schleiden, these two focused on living organisms. Moreover, in both studies, the researchers found different living organisms were composed of basic life units known as cells.
In this context, one idea that derives from the findings of the two studies is "Living things are composed of cells". Also, this conclusion is now part of modern cell theory because the basic unit of life is the cell and cells can be found in all living organisms despite the type of organism (animal, plant, fungi,etc.)
