Answer:
The initial mass of oxygen is 0.38538 Kg.
Explanation:
Given that,
Volume of tank
Molar mass = 32.0 g/mol
Gauge pressure
Initial temperature = 35.4°C
Final temperature = 20.8°C
Gauge pressure
We need to calculate initial pressure
Using formula of pressure
Put the value into the formula
We need to calculate the number of moles
Using equation of ideal gas
Put the value into the formula
We need to calculate the initial mass of oxygen
Using formula of mass
Put the value into the formula
Hence, The initial mass of oxygen is 0.38538 Kg.