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motikmotik
3 years ago
9

How many total atoms are there in 74.5 g of carbon dioxide (CO2)? I am not sure if I did it correct I ended up getting 1.02 * 10

^24 atoms? Is that correct
Chemistry
1 answer:
AlekseyPX3 years ago
5 0
Molar mass CO₂ = 44.0 g/mol

44.0 g ----------------- 6.02x10²³ molecules
74.5 g ----------------- ??

74.5 x ( 6.02x10²³) / 44.0

= 1.019x10²⁴ molecules of CO2

Calculate the number <span>of atoms :

CO</span>₂<span> => 1 atom of Carbon  ,  2 atoms of Oxygen ( 1 + 2 = 3  atoms )

therefore:
</span>
1 molecule CO2 ---------------------- 3 atoms
1.019x10²⁴ CO2 --------------------- ?? atoms

3 x ( 1.019x10²⁴) / 1 = 

= 3.057x10²⁴ atoms of CO₂

hope this helps!

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