Question

The density of he is 1.5g/l. what is the density of oxygen under same condition of temperature and pressure.​

Answer 1

Given info : The density of He is 1.5 g/L.

To find : What is the density of oxygen under the same condition of temperature and pressure.

solution : density of a gas is given by, d = PM/RT

where M is molecular weight of gas, T is temperature in Kelvin , P is Pressure and R is universal gas constant.

under the same temperature and pressure,

d ∝ M

⇒d₁/d₂ = M₁/M₂

for He, d₁ = 1.5 g/L and M₁ = 4g/mol

for O₂, d₂ = ? and M₂ = 32g/mol

now 1.5/d₂ = 4/32

⇒1.5 × 8 = d₂

⇒d₂ = 12 g/L

Therefore the density of oxygen under the same temperature and pressure is 12 g/L.

also read similar questions : The density of gas at stp is 1.5g/l at s.tp. its molecular weight is . [jee problem]

a)22.4

b)33.6g

c)33.6

d)44.8

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Answer 2

density of a gas is given by, d = PM/RT

where M is molecular weight of gas, T is temperature in Kelvin , P is Pressure and R is universal gas constant.

under the same temperature and pressure,

d ∝ M

⇒d₁/d₂ = M₁/M₂

for He, d₁ = 1.5 g/L and M₁ = 4g/mol

for O₂, d₂ = ? and M₂ = 32g/mol

now 1.5/d₂ = 4/32

⇒1.5 × 8 = d₂

⇒d₂ = 12 g/L

Therefore the density of oxygen under the same temperature and pressure is 12 g/L.