How many molecules of oxygen are there in 1.00 dm3 of oxygen at standard pressure and a temperature of 273 K. Give your answer to three significant digits.

we need no of moles

No of molecules=No of moles×Avagadro no

Hi there!

Note: 1 mole of a any gas at ST and Pressure (273 K and 1 atm) occupies a volume of 22.4 dm^3

=> x mole of oxygen occupies 1.00 dm^3

Therefore, the mole of oxygen on 1.00 dm^3 is :

Also note that Avogadros Constant says: 1 mole of any gas contains molecules.

Hence, 0.044642857 mole of oxygen will contain :

Therefore,

a boiling water reactor does not boil the water. a pressurized water reactor boils the water faster. a pressurized water reactor is heated directly by the core. a pressurized water reactor does not use fission.

practical process described pest part of scientific investigation.

because practical knowledge is powerful then therotical knowledge.