Question

How many moles of oxygen atoms are in 7.9E-1 moles of CO_2

2

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? Only give the numeric value of your answer. Don’t include the units.

Answer 1

The number of moles of O atom in
`(7.9*10^(-1))` mol of
`CO_(2)` = 1.6

Step-by-step explanation:

1 molecule of
`CO_(2)` contains 2 atoms of O

So,
`(6.023* 10^(23))` molecules of
`CO_(2)` contains
`(2*6.023*10^(23))` atoms of O.

We know that 1 mol of an atom/molecule/ion represents
`6.023*10^(23)` numbers of atoms/molecules/ions respectively.

So,
`(6.023* 10^(23))` molecules of
`CO_(2)` is equal to 1 mol of
`CO_(2)`.

`(2*6.023*10^(23))` atoms of O is equal to 2 moles of O atom.

Hence, 1 mol of
`CO_(2)` contains 2 moles of O atom.

Therefore,
`(7.9*10^(-1))` mol of
`CO_(2)` contains
`(2*7.9*10^(-1))` moles of O atom or 1.6 moles of O atom.