Предмет: Химия, автор: gekovaalisa2

срочно!!!!!!!!!!!!!!!!!!!!!!!!!!!!11
Обчисліть відносні формульні маси таких речовин:

Al 4 C 3 , Na 3 PO 4 , K 2 S 2 O 3 , Fe(OH) 3 , Ca(NO 3 ) 2 , Mg 3 N 2

Ответы

Автор ответа: gpelperat
1

Ответ:

1. Al₄C₃ (алюміній карбід):

Алюміній (Al): 27 г/моль

Вуглець (C): 12 г/моль

Відносна формульна маса Al₄C₃ = 4(27 г/моль) + 3(12 г/моль) = 108 г/моль + 36 г/моль = 144 г/моль

2. Na₃PO₄ (натрій фосфат):

Натрій (Na): 23 г/моль

Фосфор (P): 31 г/моль

Оксиген (O): 16 г/моль

Відносна формульна маса Na₃PO₄ = 3(23 г/моль) + 1(31 г/моль) + 4(16 г/моль) = 69 г/моль + 31 г/моль + 64 г/моль = 164 г/моль

3. K₂S₂O₃ (калій тіосульфат):

Калій (K): 39 г/моль

Сірка (S): 32 г/моль

Оксиген (O): 16 г/моль

Відносна формульна маса K₂S₂O₃ = 2(39 г/моль) + 2(32 г/моль) + 3(16 г/моль) = 78 г/моль + 64 г/моль + 48 г/моль = 190 г/моль

4. Fe(OH)₃ (гідроксид заліза):

Залізо (Fe): 56 г/моль

Гідроген (H): 1 г/моль

Оксиген (O): 16 г/моль

Відносна формульна маса Fe(OH)₃ = 1(56 г/моль) + 3(1 г/моль) + 3(16 г/моль) = 56 г/моль + 3 г/моль + 48 г/моль = 107 г/моль

5. Ca(NO₃)₂ (нітрат кальцію):

Кальцій (Ca): 40 г/моль

Азот (N): 14 г/моль

Оксиген (O): 16 г/моль

Відносна формульна маса Ca(NO₃)₂ = 1(40 г/моль) + 2(14 г/моль) + 6(16 г/моль) = 40 г/моль + 28 г/моль + 96 г/моль = 164 г/моль

6. Mg₃N₂ (нітрид магнію):

Магній (Mg): 24 г/моль

Азот (N): 14 г/моль

Відносна формульна маса Mg₃N₂ = 3(24 г/моль) + 2(14 г/моль) = 72 г/моль + 28 г/моль = 100 г/моль

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