Question

What is the mass of oxygen gas in 5.6 liter @stp

Answer 1

See the attachment very easy tosolve

Answer 2

⭐Hey there !!
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➡We know that 22.4L Of any gas at STP have mass which is equal to 'one more'

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Using above Hypothesis .

➡ 22.4 l of oxygen gas at stp = 1 mole

➡5.6 l of oxygen gas at stp = 5.6/22.4
= 0.25 mole

➡mass of O2 gas in 1 mole = 32 gm

➡mass of O2 gas in 0.25 mole = 0.25×32

= 8 gm

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◆Hope it will help you.