Question

given 2.5 mole of O2 what is the volume (ml) of O2 at STP

Answer 1

Answer:

• Number of moles of oxygen = 2.5 mol
• Volume of oxygen at STP (in ml) = ?

Mole : one mole is defined as that contains as many particles as present in 12 g of C-12.

$\footnotesize \implies \sf Number \: of \: moles = \dfrac{Volume \: of \: gas \: in \: (L ) \: at \: STP}{22.4 \:L }$

$\footnotesize \implies \sf 2.5 = \dfrac{Volume \: of \: gas \: in \: (L ) \: at \: STP}{22.4 \:L }$

$\footnotesize \implies \sf Volume \: of \: gas \: in \: (L ) \: at \: STP = 22.4 \times 2.5$

$\footnotesize \implies \sf Volume \: of \: gas \: in \: (L ) \: at \: STP = 56 \: L$

• 1 L = 1000 ml

$\footnotesize \implies \sf Volume \: of \: gas \: in \: (ml ) \: at \: STP = 56 \times 1000$

$\footnotesize \implies \underline{\boxed{\red{\bf Volume \: of \: gas \: in \: (ml ) \: at \: STP = 56000 \: ml}}}$