Question

The number of atoms in a 158.4 g sample of CO2 gas at STP is:

1.277 x 1025 atoms

2.167 x 1024 atoms

6.502 x 1024 atoms

6.651 x 1024 atoms

Answer 1

Option B, 2.167 x 1024 atoms

Step-by-step explanation:

1 mole of CO2 = 44.01 grams

Number of moles of CO2 in 158.4 gram sample

`(158.4)/(44.01) \\3.95`moles

Number of atoms in one mole is
`6.02*10^(23)`

Number of atoms in 3.95 moles
`2.167 *10^(24)`

Hence, option B is correct