10 points

How many more oxygen atoms are in 3Mg3(PO4)2 than in 4Al2O3?

12 more oxygen

Explanation:

An atom is the smallest particles that can take part in a chemical reaction

The given compounds are:

        3Mg₃(PO₄)₂  

 Number of oxygen atoms  = 3[2 x 4]  = 24 oxygen atoms

For;

             4Al₂O₃;

   Number of oxygen atoms  = 4 x 3  = 12 oxygen atoms

In   3Mg₃(PO₄)₂  , there are 24  - 12  = 12 more oxygen atoms than in  4Al₂O₃;

the answer is definitely c.

answer by yourhope:

how do models compare to real-world objects?

d. most models represent a real-world object in a simpler way.

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