Calculate the weight of methane in a 9.00 litres cylinder at 16 atm and `27^@C`.

Explanation

To calculate the weight of methane in a 9.00 liters cylinder at 16 atm and 27°C, we will use the ideal gas law, which is expressed as:

\[ PV = nRT \]

Where:
- \( P \) = pressure (in atm)
- \( V \) = volume (in liters)
- \( n \) = number of moles of the gas
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