Asample of 0.020 mole of oxygen gas is confined at 227°c and 0.50 atmospheres. what would be the pressure of this sample at 27°c and the same volume?

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0.3 atm

Explanation:-

Number of moles n = 0.020 mol

Pressure P 1 = 0.5 atm

Temperature T 1 = 227 C + 273 = 500 K

We know the value of universal Gas constant R = 0.082 L atm K−1 mol−1

We use the relation PV = nRT

V = nRT /P

Plugging in the values

V = 0.020 mol x (0.082 L atm K−1 mol−1 ) x 500 K / (0.5 atm)

= 1.64 L

Now the new temperature T 2 = 27 C + 273 = 300 K.

Volume is same = 1.64 L

Number of moles n is same = 0.020 mol

Once again we use the relation

PV = nRT

New Pressure P = nRT / V

= 0.020 x 0.082 L atm K−1 mol−1 x 300 K / 1.64 L

= 0.3 atm

electron microscopy and scanning tunneling microscopes gives us a greater understanding of atoms by being able to see the atom itself, and lets us see some atomic reactions.

explanation:

the earth would become to overheated and everything alive on it will eventually die from overheating. plants will eventually die as well, water will evaporate, and it will be nothing but a hot planet without anything living on it.