B because there are 12 electron pairs in C03(-2) and 12 pairs=24
Answer:
pH = 0.984
Explanation:
<em>Molarity LiOH = 2.1x10⁻²M</em>
<em />
HCl will react with LiOH as follows:
HCl + LiOH → H₂O + LiCl
<em>1 moles of HCl reacts per mole of LiOH</em>
<em />
Moles of each reactant in solution are:
HCl = 0.477L ₓ (0.17mol / L) = 0.08109 moles HCl
LiOH = 0.253L ₓ (2.1x10⁻² mol / L) = 5.313x10⁻³ moles of LiOH.
That means LiOH is the limiting reactant and excess moles of HCl that will remain in solution are:
0.08109 mol - 0.005313mol = 0.0758 moles HCl
As HCl dissociates in water as H⁺ and Cl⁻ ions, you will have in solution 0.0758 moles of H⁺
pH = -log [H⁺] and [H⁺] = moles H⁺ / L of solution.
Volume of the mixture in liters is: 0.477L + 0.253L = 0.730L.
That means [H⁺] is 0.0758 moles of H⁺ / 0.730L = 0.1038M
Replacing:
pH = -log [H⁺]
pH = -log [0.1038]
<h3>pH = 0.984 </h3>
I think 25 grams.
Z = 76^2.2 x pi
Mass is both a property of a physical body and a measure of its resistance to acceleration when a net force is applied. An object's mass also determines the strength of its gravitational attraction to other bodies. The basic SI unit of mass is the kilogram.
Explanation:
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