D human dna which is a molecule in cell
Answer: 15.7 liters
Explanation: reaction is 2H2 + O2. -> 2H2O
Because all substance still are gases, volumes in
STP conditions are proportional to amount of moles.
Amount of water is same as Hydrogen. Also volume is same.
PH = 4.2
[H+] = 10 ^- pH
[H+] = 10 ^- 4.2
[H+] = <span>0.00006 M
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Answer D
