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Authored by Liza Indahsari
Chemistry
10th Grade

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20 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
1
3
5
4
15
2.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
Serbuk magnesium yang massanya 3 gram tepat bereaksi dengan sejumlah serbuk belerang menghasilkan senyawa magnesium sulfida yang massanya 7 gram. Massa serbuk belerang yang telah bereaksi adalah....
10 gram
7 gram
4 gram
3 gram
1 gram
3.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
A dan B bereaksi membentuk dua senyawa. Untuk senyawa pertama 1,4 gram A bereaksi dengan 3,2 gram B. Untuk senyawa kedua 0,7 gram A bereaksi dengan 0,4 gram B. Berapakah perbandingan unsur A dalam senyawa pertama terhadap unsur A dalam senyawa kedua?
1:1
2:1
1:2
1:4
4:1
4.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
Jika 14 g gas nitrogen bereaksi dengan gas hidrogen menghasilkan 17 g gas amonia, jumlah gas hidrogen yang bereaksi adalah…
34
5
3
31
28
5.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
Sepotong kayu yang massanya 25 gram tepat terbakar dengan 90 gram gas oksigen membentuk gas CO2, uap air, dan abu. Pernyataan yang tepat mengenai peristiwa ini adalah ....
massa abu yang terbentuk adalah 115 gram
massa abu yang terbentuk adalah 25 gram (sama dengan massa kayu)
jumlah massa uap air, gas CO2, dan abu adalah 115 gram
massa CO2 dan air adalah 65 gram
massa gas CO2 , dan uap air adalah 90 gram
6.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
Penerapan Hukum Lavoisier di dalam reaksi kimia : A + 2B → C + 3D adalah ....
massa A = massa C
massa B = massa D
massa A + 2B = massa C + 3D
massa A + B = massa C + D
massa A,B,C,D adalah sama
7.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
Perbandingan unsur besi dengan belerang adalah 7:4, jika massa besi 14 gram ,berapakah massa campuran besi dengan belerang ( Besi Sulfida )
21 gram
22 gram
23 gram
24 gram
25 gram
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