The answer is (3) hydrogen ions as the only positive ions in solution. One ionic compound must have positive ion and negative ion at the same time. The Arrhenius base has hydroxyl ion as only negative ions in solution.
According to Ideal Gas Equation, Volume is related to Pressure and Temperature as follow,
P V = n R T
Or,
V = n R T / P
This relation shows that Volume is directly related to Temperature and Inversely related to pressure. So,
<span>A. Chilling a can of soda: As temperature is decreased so the volume will also decrease.
</span><span>B. Heating a hot-air balloon: As temperature is increased, so Volume will also increase.
</span><span>C. Squeezing a balloon: As pressure is applied, so volume will decrease.
</span><span>D. Pressurizing an air tank: Again pressure is applied so volume will decrease.</span>
using the equation of formation of water:
H2+O2---->H2O
Balancing the equation,
2H2+O2---->2H2O
So now use the ratio from the balance equation, we know that 2 mol of H2 are producing 2 mol of H2O so the ratio will be 1:1.
So as 2 mol of H2O are produced by 2 mol of H2.
That implies 1 mol of H2O are produced by 1 mol of H2.
That is 0.253 mol of H2O are produced by 0.253 mol of H2.
