Answer:
0.5 moles or 16 grams
Explanation:
The Avogadro's number links the number of elementary particles (like molecules) with a mole of substance (here O2). So:
number of moles = number of molecules/Avogadro's number
number of moles = 3.01 x 10^23 molecules/(6.023 x 10^23 molecules/mole) = 0.5 moles
To convert moles into mass we need the molar mass of the substance.
Molar mass of O2 = 32 grams/mole
Now we can compute the mass as follows:
mass = number of moles * molar mass
mass = 0.5 moles * 32 grams/mole = 16 grams
The quantity of oxygen, containing 3.01 x 10^23 molecules is 16 grams
To calculate the number of molecules, we first calculate the number of moles.
Number of mole = number of molecules/Avogadro's number
Number of moles = [tex]=\dfrac{3.01 \times10^2^3 }{6.023 x 10^2^3} = 0.5 \;moles[/tex]
Now, the molar mass of oxygen is 32 g/mole
The mass = number of mole divided by the molar mass
[tex]0.5\times32= 16 \;g[/tex]
Thus, the quantity is 16 grams.
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