Question

How many atoms are in 2.50 moles of co2?

a. 4.52 x 1024 atoms
b. 1.52 x 1024 atoms
c. 5.02 x 1023 atoms
d. 3.01 x 1024 atoms
e. 7.53 x 1023 atoms?

Answer 1

2.5 mol CO2 ( 2 mol O / 1 mol CO2 ) ( 6.022 x 10^23 atom / mole ) = 3.011 x 10^24 atoms of oxygen

Avogadro's number represents the number of units in one mole of any substance. This has the value of 6.022 x 10^23 units / mole. this could be converted.

Answer 2

Answer : The correct option is, (a)
`4.52* 10^(24)`

Explanation :

As we know that,

1 mole of substance contains
`6.022* 10^(23)` number of atoms.

As we are given that:

The moles of
`CO_2` = 2.50 moles

Now we have to calculate the number of atoms present in
`CO_2` molecule.

In
`CO_2`, there are 3 atoms in
`CO_2` molecule that means 1 atom of carbon and 2 atoms of oxygen.

As, 1 moles of
`CO_2` contains
`3* 6.022* 10^(23)` number of atoms.

So, 2.50 moles of
`CO_2` contains
`2.50* 3* 6.022* 10^(23)=4.52* 10^(24)` number of atoms.

Therefore, the number of atoms in 2.50 moles of
`CO_2` are
`4.52* 10^(24)`