Okay, pls give brainliest because I answered the fastest and how are you?
Answer:
4.4g
Explanation:
Mass of CaCO3 = 10g
Mass of CaO = 5.6g
Mass of CO2 =?
Mass of CaCO3 = Mass of CaO + Mass of CO2
Mass of CO2 = Mass of CaCO3 — Mass of CaO
Mass of CO2 = 10 — 5.6
Mass of CO2 = 4.4g
7. 1,2,2,2
8. 4,3,1
9. 1,4,1,2
10. 3,4,1,4
(4) total number of valence electrons, because they exist in the same group.
The chemical symbol for gold is AU