Answer:
1) [OH⁻] = 0.065 M
2) [H₃O⁺] = 1.54 x 10⁻¹³ M.
3) pH = 12.81.
Explanation:
HCl is completely dissociated yo its ions in solution:
<em>KOH + H₂O → H₃O⁺ + K⁺ + OH⁻,
</em>
<em></em>
1) [OH⁻] = 0.065 M.
<em>2) [H₃O⁺]:
</em>
∵ [H₃O⁺][OH⁻] = 10⁻¹⁴.
∴ [H₃O⁺] = 10⁻¹⁴/[OH⁻] = 10⁻¹⁴/(0.065 M) = 1.54 x 10⁻¹³ M.
<em>3) pH:
</em>
For strong acids like HCl:
pH = - log[H₃O⁺] = - log[1.54 x 10⁻¹³ M] = 12.81.
<span>Isotopes of the same element differ in their "Atomic masses"
Hope this helps!</span>
Answer:
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Answer:
17.5609grams
Explanation:
According to the question, a sample of mass 6.814 grams is added to another sample weighing 0.08753 grams i.e.
= 6.814 + 0.08753
= 6.90153 grams
The result of this mixture i.e. 6.90153 grams is divided into three equal parts i.e.
= 6.90153 ÷ 3
= 2.30051 grams
This means that each equal part weighs 2.30051 grams
One of the yield (2.30051 grams) is multiplied by 7.6335 times i.e.
= 2.30051 × 7.6335
= 17.56094309
Hence, the final mass is 17.5609grams
Yes I would.
You do need parental or another supervision because you never know what would happen , and if you do have all of the supplies you need than i guess you can go ahead and do it.
Plus that means you have the safety procedures.
I really hope this helps you a lot
