At STP a gas occupies a 64.6 kiloliter balloon. How many mol of the gas must be in the balloon? Write answer in a whole number.

2900 moles gas

Explanation:

PV =nRT => n = PV/RT

at STP ...

P = 1 Atm

V = 64.6KLiters = 6.46 x 10⁴ Liters

n = unknown

R = 0.08206 L·Atm/mol·K

T = 0⁰C = 273K

n = (1 Atm)(6.46 x 10⁴L)/(0.08206 L·Atm/mol·K)(273K) = 2897 moles ≈ 2900 moles

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