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24-04-2024
Chemistry

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Еквімолярну суміш цинку, магнію та міді помістили у хлоридну кислоту, взяту з надлишком. Після закінчення реакції виявили нерозчинний залишок, маса якого становила 12,8 г. Визначте масу вихідної суміші.

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