Answer: 2.78 moles of molecular oxygen will occupy 62.22 liters.
Explanation:
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Answer:
His results will be skewed because there was more water than stock solution. Which would cause the percentage solution to be less than 50% therefore the density would be less than the actual value.
Explanation:
The solution will have percentage less than that of 50%. Therefore the density would be less than the actual value.
Suppose there should be 50 mL of the solution, and he added 60 mL. So 10 mL of the solution is added more.
Suppose the mass of the solute is m.
Originally, the density is =

Now after adding extra 10 mL , the density becomes
.
Therefore, 
So the density decreases when we add more solution.
Answer:
Explanation:
The neutral one has atomic structure 1s2 2s2
The one with a positive charge could be 1s2 2s which has lost one of its 2s electrons.