Đáp án + giải thích các bước giải:

`M_{Na_{2}CO_{3}} = 23.2 + 12+16.3 = 106` (g/mol)

`M_{K_{3}PO_{4}} = 39.3+31+16.4 = 212` (g/mol)

`M_{Al(OH)_{3}} = 27 + (1+16).3 = 78` (g/mol)

`M_{Al_{2}(SO_{4})_{3}} = 27.2 + (32+16.4).3 = 342` (g/mol)

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`M_{Na} = 23` g/mol

`M_{C} = 12` g/mol

`M_{O} = 16` g/mol

`M_{K} = 39` g/mol

`M_{P} = 31` g/mol

`M_{Al} = 27` g/mol

`M_{S} = 32` g/mol