How many silicon and oxygen atoms are in the formula, Ca₃Mg₅(Si₄O₁₁)₂(OH)₂?

Name: How many silicon and oxygen atoms are in the formula, Ca 3 Mg 5 (Si 4 O 11 ) 2 (OH) 2 ?
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Question

Quizplus · Accepted Answer

The formula contains (Si4O11)2, which means there are 2 groups of Si4O11. Therefore, there are 4 Si atoms per group times 2 groups, totaling 8 Si atoms. Similarly, there are 11 O atoms per group times 2 groups, totaling 22 O atoms, plus 2 O atoms from (OH)2, making a total of 24 O atoms.

How Many Silicon and Oxygen Atoms Are in the Formula