Answer:
There are <span>1.479×<span>10<span>−13</span></span></span> concentration of hydrogen ions <span>mo<span>lL</span></span>.
Explanation:
Because pH is a logarthmic scale, we can use the formula: <span><span>[<span>H+</span>]</span>=<span>10-pH</span></span>. Where...
=> <span>[<span>H+</span>]</span> is the concentration of hydrogen ions in the solution.
=> <span>pH</span> is the pH of the solution.
=> Where 10 is the base of the power - it's a logarithm formula.
We can now just sub in the values and solve for [<span><span>H+</span>]</span>.
<span><span><span>[<span>H+</span>]</span>=<span>10-pH</span></span><span><span>=<span>10<span>−<span>(12.83)</span></span></span></span><span>=1.479108388×<span>10<span>−13</span></span></span></span></span>
We can round (if required) to <span>1.479×<span>10<span>−13</span></span></span>.
Thus, there are <span>1.479×<span>10<span>−13</span></span></span> concentration of hydrogen ions <span><span>mol</span>L</span>.
Hope this helps :)
Answer:
Explanation:
-We convert Ca(OH)₂ grams to moles using its <em>molar mass</em>:
- 31.82 g ÷ 74.093 g/mol = 0.43 mol
-We convert K₂SO₃ moles to grams using its <em>molar mass</em>:
- 3.2 mol * 158.26 g/mol = 506.4 g
-One formula unit of HCl is HCl. We convert molecules to moles using <em>Avogadro's number</em>:
- 7.25x10²³ molecules ÷ 6.023x10²³mol/molecules = 1.20 mol
-At STP, <em>one mol of any gas occupies 22.4 L</em>:
- 46.6 L * 1 mol / 22.4 L = 2.080 mol
[NH₄⁺] = 1.64 × 10⁻³ M
Explanation:
We have the following chemical equilibrium:
NH₃ + H₂O ⇔ NH₄⁺ + H O⁻
Kb is defined:
Kb = ( [NH₄⁺] × [H O⁻] ) / [NH₃]
and if we rearrange the therms:
Kb × [NH₃] = [NH₄⁺] × [H O⁻]
[NH₄⁺] × [H O⁻] = Kb × [NH₃]
The concentration of ammonium ion [NH₄⁺] is equal to the concentration of hydroxide ion [H O⁻]. Taking this in account we get:
[NH₄⁺]² = Kb × [NH₃]
[NH₄⁺]² = 1.80 × 10⁻⁵ × 0.150
[NH₄⁺] = √ (1.80 × 10⁻⁵ × 0.15)
[NH₄⁺] = 1.64 × 10⁻³ M
Learn more about:
problems with acid and bases
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Answer:
D) 20.0 atm
Explanation:
To solve this problem, we can apply Boyle's law, which states that:
"For a constant mass of an ideal gas kept at constant temperature, the pressure of the gas is inversely proportional to the volume of the gas".
Mathematically:
where
p is the gas pressure
V is the volume of the gas
The equation can also be rewritten as
where in this problem:
is the initial pressure of the gas
is the initial volume of the gas
is the final volume of the gas
Solving for p2, we find the final pressure of the gas:
Answer:
See explanation
Explanation:
1. Decomposition= when one compound or substance is separated into 2 elements.
2. Single displacement: b is switched with c
3. double displacement: when 2 reactants form 2 different products