Answer:
Helium
Explanation:
To make 250 ml of 0.1 M NaOH, you dissolve 1 gram NaOH in enough water to make a final volume of 250 mls.
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152.26 mmHg
pv=p'v'
525× 25=p'×86.2
p'=525×25÷ 86.2
p'=152.26