Answer:
13.20
Explanation:
Step 1: Calculate the moles of Ba(OH)₂
The molar mass of Ba(OH)₂ is 171.34 g/mol.
0.797 g × 1 mol/171.34 g = 4.65 × 10⁻³ mol
Step 2: Calculate the molar concentration of Ba(OH)₂
Molarity is equal to the moles of solute divided by the liters of solution.
[Ba(OH)₂] = 4.65 × 10⁻³ mol/60 × 10⁻³ L = 0.078 M
Step 3: Calculate [OH⁻]
Ba(OH)₂ is a strong base according to the following equation.
Ba(OH)₂ ⇒ Ba²⁺ + 2 OH⁻
The concentration of OH⁻ is 2/1 × 0.078 M = 0.16 M
Step 4: Calculate the pOH
pOH = -log OH⁻ = -log 0.16 = 0.80
Step 5: Calculate the pH
We will use the following expression.
pH + pOH = 14
pH = 14 - 0.80 = 13.20
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An ancient sword has a blade from the early Roman Empire, around 100 AD, but the wooden handle, inlaid wooden decorations, leather ribbon, and leather.
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A political unit known as an empire is made up of many different nations and regions that is "often established by conquest and divided into a dominant center and submissive peripheries." By a strict definition, an empire is a sovereign state with an emperor as its head of state; however, not all states with a combined territory under the control of supreme authorities are referred to as empires or ruled by emperors, and not all self-described empires have been recognized as such by historians and contemporaries (the Central African Empire, and some Anglo-Saxon kingdoms in early England being examples).
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To learn more about Empire from the given link:
brainly.com/question/1892495
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