Answer:
Explanation:
1 Al = 26.98 AMU
3 Br = 239.7 AMU
AlBr3 = 266.69 AMU
Al = (26.98)/(266.69) = 10.1%
Br3 = (239.7)/(266.69) = 89.9%
The hydronium ion concentration of a pH = 9.2 of solution is 6.3 × 10⁻¹⁰M.
<h3>How do we calculate pH?</h3>
pH of the solution is define as the negative logarithm of the concentration of the hydronium ion as:
pH = -log[H⁺]
Or [H⁺] =
Given that pH value = 9.2
On putting values, we get
[H⁺] = = 6.3 × 10⁻¹⁰M
Hence required concentration of hydronium ion is 6.3 × 10⁻¹⁰M.
To know more about pH, visit the below link:
brainly.com/question/172153
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In a physical change the appearance or form of the matter changes but the kind of matter in the substance does not. However in a chemical change, the kind of matter changes and at least one new substance with new properties is formed. The distinction between physical and chemical change is not clear cut.
The answer is H—F. Fluorine is the most electronegative of the four halogens (and, in fact, of all the elements), so it does the best job of gathering the shared electrons to itself. Therefore, the bond with F is the most polar
Answer:
The new concentration of CO₂ dissolved is 0.0085 M
Explanation:
Applying the equation below;
where;
P₁ is the initial pressure = 4 x 10⁻⁴ atm
P₂ is the final pressure = 0.25 atm
n₁ is the initial concentration = 1.36 x 10⁻⁵ M
n₂ is the final concentration = ?
n₂ = (n₁*P₂)/(P₁)
n₂ = (1.36 x 10⁻⁵ X 0.25)/(4 x 10⁻⁴)
n₂ = 0.0085 M
Therefore, the new concentration of CO₂ dissolved is 0.0085 M