Answer:892.85moles
Step-by-step explanation:
1mol= 22.4L at stp
Therefore 20,000L = 20,000/22.4= 892.85 moles
or you use
PV= nRT
n= PV/RT= 1.00atmX 20,000l/ 0.08206atm.L/mol. k x 273k
= 892.85moles
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