The number of atoms 3.2 g of oxygen gas are
Answers
Answered by
2
Explanation:
O2 is the chemical formula of Oxygen
We know ,
1 mole of a substance contains 6.022×10^23
Here, Molar mass of O = 16u
And molar mass of O2 = 32u
And 32g of O2 = 1 mole of O2
Therefore 32g of O2 has molecules = 6.022×10^23
Since 1 molecule of O2 has 2 atoms
Therefore 32g of O2 has atoms=2*6.02×10^23
Answered by
2
Answer:
number of atoms in 3.2 g of oxygen gas = 12.044*10^22
Explanation:
molecular mass of oxygen molecule= 32
number of moles in 3.2 g oxygen gas = 3.2/32 =0.1 mole
( number of moles = given mass/molecular mass)
number of molecules in 0.1 mole = 0.1 *(6.022*10^23)
= 6.022*10^22
therefore number of atoms = 2*(6.022*10^22) = 12.044*10^22
(number of atoms in oxygen gas = 2)
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