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Teka-teki Kekekalan Massa

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Teka-teki Kekekalan Massa

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About this activity

Padukan logika: massa tak bisa hilang atau bertambah.

Created by

Haya Satirah
Haya Satirah
Indonesia

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Teka-teki Kekekalan Massa
 

Teka-teki Kekekalan MassaOnline version

Padukan logika: massa tak bisa hilang atau bertambah.

by Haya Satirah
1

Ilmuwan yang membuktikan bahwa massa zat sebelum dan sesudah reaksi tetap sama.

Hints

Konsep ini diuji dengan percobaan reaksi di wadah tertutup.

Massa tidak hilang meski zat berubah bentuk.

Jumlah total zat sebelum dan sesudah reaksi sama.

2

Contoh peristiwa yang menunjukkan penyimpangan kecil dari hukum kekekalan massa.

Hints

Perubahan energi sangat besar.

Massa tampak berkurang karena berubah menjadi energi.

Termasuk dalam reaksi ledakan.

Namun selisih massanya sangat kecil dan bisa diabaikan.

3

Hukum dasar yang menyatakan bahwa “massa zat tidak berubah selama reaksi kimia.

Hints

Dinyatakan oleh Antoine Lavoisier.

Massa zat sebelum reaksi = massa zat sesudah reaksi.

Dibuktikan melalui eksperimen pembakaran dalam wadah tertutup.

Menjadi dasar perhitungan stoikiometri.

4

12 g Mg bereaksi dengan 8 g O₂ membentuk MgO. Berapa massa MgO?

Hints

Sistem tertutup.

Massa total tetap.

Tambahkan massa pereaksi.

5

10 g CaCO₃ dipanaskan → CaO + CO₂. Setelah reaksi, massa padatan tinggal 5.6 g. Berapa massa CO₂?

Hints

Massa awal sistem 10 g.

CO₂ keluar jika sistem terbuka, tapi total tetap sama.

CO₂ = massa awal − massa padatan akhir.

6

40 g pereaksi menghasilkan 18 g produk P dan sisanya produk Q. Berapa massa Q?

Hints

P + Q = total.

18 + Q = 40

 
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