izaiahfieods
06.02.2022 •
Chemistry
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.
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Ответ:
we need no of moles
No of molecules=No of moles×Avagadro no
Ответ:
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,
Ответ:
0.35 g/mL
Explanation:
Use the formula D = , where D is density, m is mass, and v is volume.
D = 4.9/14
D = 0.35
D = 0.35 g/mL