Question

7. The highest mass corresponds to which of the
following?
1) one molecular of O,
2) 1 x 10-23 g mole of CO2
3) An 02 ion
4) 1 mole of O2
2.​

Answer 1

Answer:

one molecular of O is a correct option.

Answer 2

Answer:

One mole of O2 has the highest mass.

Explanation:

• 1. 6.023 x $10^2^3$ molecules of O have the mass 16 gram.

So one molecule has the mass $\frac{16}{6.023 X 10^{23}}$ gram; 2.65 x $10^{-23}$ gram.

• 2. One mole of CO2 has the mass = 1 x 12 + 2 x 16 = 12 + 32 = 44 gram.

So, $10^{-23}$ mole of CO2 has the mass 44 x $10^{-23}$ gram.

• 3. One mole of O2 has the mass 32 gram.

So, one O2 ion has the mass $\frac{32}{6.023 X 10^{23}}$ gram; 5.31 x $10^{-23}$ gram.

• 4. One mole of O2 has the mass of 32 gram.

Therefore one mole of O2 has the highest mass in the given question.

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