An atom contains three protons, two neutrons, and one electron. What is the charge of the nucleus?
1 answer:
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This is an incomplete question, here is a complete question.
Hydrogen chloride and oxygen react to form water and chlorine, like this:
Use this chemical equation to answer the questions in the table below.
Suppose 155. mmol of HCl and 38.8 mmol of O₂ are added to an empty flask. How much HCl will be in the flask at equilibrium?
(1) None.
(2) Some, but less than 155. mmol,
(3) 155. mmol,
(4) More than 155. mmol,
Answer : The correct option is, (1) None
Explanation :
The given balanced chemical reaction is:
From the balanced chemical reaction, we conclude that
As, 4 mmole of HCl react with 1 mmoles of
So, 155. mmole of HCl react with mmoles of
That means, is excess reagent and
is a limiting reagent. All the moles of HCl will consume.
Hence, the correct option is, None.
Answer:
the concentration of bicarbonate is <em>[HCO₃⁻] = 0,03996 M </em>and carbonate is <em>[CO₃²⁻] = 3,56x10⁻⁵ M.</em>
Explanation:
Carbonate-bicarbonate is:
HCO₃⁻ ⇄ CO₃²⁻ + H⁺ With pka = 10,25
Using Henderson-Hasselbalach formula:
pH = pka + log₁₀
7,2 = 10,25 + log₁₀
8,91x10⁻⁴ = <em>(1)</em>
Also:
0,040 M = [CO₃²⁻] + [HCO₃⁻] <em>(2)</em>
Replacing (2) in 1:
<em>[HCO₃⁻] = 0,03996 M</em>
Thus:
<em>[CO₃²⁻] = 3,56x10⁻⁵ M</em>
I hope it helps.