Предмет: Химия, автор: daniling13

Відносна молекулярна маса сполуки, хімічна формула якої ХаОз- 102. Назвіть невідомий металічний елемент Е

Ответы

Автор ответа: unezhewaoxnw6u
1

Объяснение:

Е2О3=102

2х+3×16=102

2х=54

х=27 Алюміній.

Al2O3 M=2×27+3×16=102

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