Question

calculate the amount of oxygen in 64 gram of oxygen molar mass of that is 16gram mol-1​

Answer 1

Explanation:

64 gm of Oxygen comprises of 3.556 moles. One mole of any substance has 6.022140857×10^23 molecules. Thus, 3.556 moles of Oxygen has 21.412 * 10^23 number of molecules.

Answer 2

Answer:

12.04 x 10^23 molecules.

Explanation:

According to Avogadro's law, the Gram Molecular Weight (G.M.W) of a substance contains 6.022*10^23 molecules.

The Gram molecular weight of oxygen = 32 g

Therefore, 32 g of oxygen contains 6.022*10^23 molecules

1 g oxygen contains =6.022*10^23/32 molecules

64 g oxygen contains = 6.022*10^23*64/32 = 12.044*10^23 molecules

Therefore 64 g of oxygen contains = 1.2044*10^24 molecules or 12.044*10^23 molecules

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