Molar mass Na = 23.0 g/mol
1 mol ---- 23.0 g
n mol ---- 69 g
n = 69 / 23.0
n = 3.0 moles
1 mole -------- 6.02x10²³ molecules
3.0 moles ---- ?
3.0 * 6.02x10²³ / 1
= 1.806x10²⁴ molecules
hope this helps!
Answer:
A. 2 bonds
Explanation:
If you see a charch of ci20 it would easily show the answer.
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Scandium lost 3 electrons and gave them to oxygen the formula would be Sc2O3
Empirical evidence is information acquired by observation or experimentation