V = 1.66 m3.
T = 280 ° C.
P = 2 * 10 ^ 6 Pa.
m = 4.6 kg.
R = 8.31 m2 * kg / s2 * ° K * mol.
You can determine which gas is in the cylinder using the periodic table. For this, it is necessary to know its molar mass M.
Let us write down the Mendeleev-Cliperon law: P * V = m * R * T / M, where P is the gas pressure, V is the gas volume, m is the gas mass, R is the universal gas constant, T is the absolute temperature.
M = m * R * T / P * V.
M = 4.6 kg * 8.31 m2 * kg / s2 * ° K * mol * 280 ° K / 2 * 10 ^ 6 Pa * 1.66 m3 = 0.0032 kg / mol.
The molar mass of oxygen O2 is M = 0.0032 kg / mol.
Answer: there is oxygen in the cylinder.
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