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,

може ли да зареждате повече информация, моля

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8