Question

0.5 g molecules of oxygen. find 1. mass 2. number of molecules 3. volume of oxygen 4. number of oxygen atom ​

Answer 1

Answer:

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Answer 2

Answer:

(i) n = 0.5 mole; Molar mass(M) of oxygen = 16 x 2 = 32 g.

Since, mass of 1 mole of oxygen = 32.

So, mass of 0.5 mole = m = 0.5 x 32.

= 16 g.

(ii) No. of atoms, N = 3.011 x 1023 ; N0 = 6.022 x 1023 ; molar mass, M = 16 g.

Number of moles, n = N = 3.011 x 1023 = _1.

N0 6.022 x 1023 2.

Mass = Molar mass x n.