Group 14 or carbon family

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Question

How many of the following have correct formulae
$N a_{2} S i O_{3} - S o d i u m s i l i c a t e, Z i r c o n - Z r S i O_{4}, P h e n a c i t e - B e_{2} S i O_{4}, B e r y l - B e_{3} A l_{2} S i_{6} O_{18}, T a l c - M g {(S i_{2} O_{5})}_{2} . M g {(O H)}_{2}, E n s t a t i t e - M g S i O_{3}$

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Solution

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$N a subscript 2 S i O subscript 3 minus S o d i u m space s i l i c a t e comma space space space space space spaceZ i r c o n minus Z r S i O subscript 4 comma space space space space space spaceP h e n a c i t e minus B e subscript 2 S i O subscript 4 comma space space space space space space spaceB e r y l minus B e subscript 3 A l subscript 2 S i subscript 6 O subscript 18 comma space space space space space space space space spaceT a l c minus M g left parenthesis S i subscript 2 O subscript 5 right parenthesis subscript 2. M g left parenthesis O H right parenthesis subscript 2 space comma space space space space space spaceE n s t a t i t e minus M g S i O subscript 3$

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Group 14 or carbon family

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How many of the following have correct formulaeNa2SiO3-Sodium silicate, Zircon-ZrSiO4, Phenacite-Be2SiO4, Beryl-Be3Al2Si6O18, Talc-Mg(Si2O5)2.Mg(OH)2 , Enstatite-MgSiO3

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How many of the following have correct formulae
$N a_{2} S i O_{3} - S o d i u m s i l i c a t e, Z i r c o n - Z r S i O_{4}, P h e n a c i t e - B e_{2} S i O_{4}, B e r y l - B e_{3} A l_{2} S i_{6} O_{18}, T a l c - M g {(S i_{2} O_{5})}_{2} . M g {(O H)}_{2}, E n s t a t i t e - M g S i O_{3}$