Okay this is a simple question for States of Matter chapter of Inorganic Chemistry.
32 g of oxygen contains 22.4 litre's or 22400 cm3 now 6.4. g contains 22.4 X 0.2= 4.48 litre or 4480 cm³ or ml
Practice more such simple and complicated mcqs specially if you preparing for national level competitive entrance examinations.
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https://engineering.careers360.com/articles/jee-main-preparation-tips-for-chemistry
Best wishes. Thank you.
Question : Simplify the expression $\frac{s^2+t^2+2 s t-u^2}{s^2-t^2-2 t u-u^2}$, provided $(s+t+u) \neq 0$.
Option 1: $\frac{s+t-u}{s-t-u}$
Option 2: $\frac{s+t+u}{s-t+u}$
Option 3: $\frac{s-t-u}{s+t-u}$
Option 4: $\frac{s-t+u}{s+t+u}$
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