Question

What is the relative atomic mass of carbon dioxide (CO2)?

Answer 1

Answer:

Relative atomic mass of CO2 = 44.01 u

The relative atomic mass of carbon dioxide (CO2) can be calculated by adding the atomic masses of the constituent atoms.

Carbon has an atomic mass of 12.011 u, while oxygen has an atomic mass of 15.999 u. Since carbon dioxide contains one carbon atom and two oxygen atoms, we can calculate its relative atomic mass as follows:

Relative atomic mass of CO2 = (1 x atomic mass of carbon) + (2 x atomic mass of oxygen)

Relative atomic mass of CO2 = (1 x 12.011 u) + (2 x 15.999 u)

Relative atomic mass of CO2 = 44.01 u

Therefore, the relative atomic mass of carbon dioxide (CO2) is approximately 44.01 atomic mass units (u).

Answer 2

Atomic mass of C (Carbon) = 12

Atomic mass of O (Oxygen) = 16.

Atomic mass of
`\sf O_2` = 16 × 2 = 32

Atomic mass of
`\sf CO_2` = Atomic mass of C +Atomic mass of
`\sf O_2`

Atomic mass of
`\sf CO_2` = 12 + 32

Atomic mass of
`\sf CO_2` = 44 u

Atomic mass of first 20 elements :

1. (H) Hydrogen - 1.00797

2. (He) Helium - 4.00260

3. (Li)Lithium- 6.941

4. (Be) Beryllium- 9.01218

5. (B) Boron- 10.81

6. (C) Carbon- 12.011

7 . (N) Nitrogen- 14.0067

8. (O) Oxygen- 15.9994

9. (F) Fluorine- 18.998403

10. (Ne) Neon- 20.179

11. (Na) Sodium- 22.98977

12.(Mg)Magnesium- 24.305

13. (Al) Aluminum- 26.98154

14. (Si) Silicon -28.0855

15. (P) Phosphorus- 30.97376

16. (S) Sulfur- 32.06

17. (Cl) Chlorine- 35.453

18.(Ar)Argon- 39.948

19. (K) Potassium- 39.0983

20. (Ca) Calcium- 40.0