Question

One mole of oxygen gas at STP is equal to * 12.044× 10²³ molecules of oxygen 6.022× 10²³ atoms of oxygen 16g of oxygen 32g of oxygen

Answer 1

One mole of Oxygen gas at STP is equal to 32 g of Oxygen

Thus, option (3) is correct.

Explanation:

• The molecular weight of Oxygen gas (O₂) = 32

• In one mole of Oxygen gas

• The number of molecules will be = 6.023 × 10²³

• The number of atoms will be = 2 × 6.023 × 10²³ = 12.044 × 10²³

• The weight of one mole of Oxygen gas will be  = 32 gram

Therefore, from the given options we find that option (3) is correct

Hence,

One mole of Oxygen gas at STP is equal to 32 g of Oxygen

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Answer 2

Given :

One mole of oxygen gas .

To find :

At STP , one mole of oxygen gas is equal to what .

Solution :

1 mole of oxygen gas = N$_a$ number of molecules of oxygen

                                    = 6.022× 10²³ molecules of oxygen

Molecular weight of oxygen gas = 2 * 16 = 32

1 mole of oxygen gas = 32 g of oxygen

At STP , one mole of oxygen gas is equal to 32 gram of oxygen .