Answer: 
Explanation: All the Arrhenius and Bronsted Lowry acids release ions in solution.
According to Arrhenius and Lowry, acids are substances which release ions when dissolved in water.
Thus 
all are considered as acids,
If you could explain what “merkels” are, the question would be more clear.
They all consist of Hydroxide particles (OH)
and they produce hydroxide ions (OH-) when placed in water/aqueous solution.
Answer:
30 moles of water will produced.
Explanation:
Given data:
Number of moles of O₂ react = 15 mol
Number of moles of water formed = ?
Solution:
Chemical equation:
2H₂ + O₂ → 2H₂O
Now we will compare the moles of water with oxygen.
O₂ : H₂O
1 : 2
15 : 2×15 = 30 mol
30 moles of water will produced.
