which of the following ions is formed when the positive hydrogen ions from an acid bond to water molecules? H- OH- H2O+ H3O+
2 answers:
Answer : The correct option is,
Explanation :
Acid : It is a substance that has ability of donating proton or hydrogen ion, .
The general acid dissociation reaction will be,
As per question, when the positive hydrogen ions bonded to the water molecule then it forms hydronium ion.
The balanced reaction will be,
Hence, the ion formed is,
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Answer:
12 atm
Explanation:
First, let us convert Celcius into Kelvin: 28.0 °C = 301.15 K and 129.0 °C = 402.15 K
For this question we must employ the Combined Gas Law: , where
is the initial pressure and
is the new pressure.
We know that intitially, P=9 atm, V=30 L, and T=301.15K. From our problem, only temperature and pressure changes, while the number of moles, volume and the gas constant, R, stay the same, so they are irrelevant.
Thus, the filled out Combined Gas Law would be:
=
, where the volume, moles of gas, and R are cancelled out.
We can manipulate this equation to derive the new pressure. We find that
9atm≈0.74885.
This means that
≈9/0.74885≈12 atm