latihan stokiometri
Quiz
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Others
•
11th Grade
•
Easy

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15 questions
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1.
OPEN ENDED QUESTION
1 min • 1 pt
Berapakah massa Al2(SO4)3 yang diperlukan untuk mendapatkan 0,05 mol Al2(SO4)3? ( Ar Al = 27; S = 32; O = 16)
Jawab hanya dengan memasukkan angka tanpa satuan.
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2.
OPEN ENDED QUESTION
1 min • 1 pt
Suatu senyawa mempunyai komposisi 22,9% Na, 21,5% B, dan 55,6% O. Jika diketahui massa molar senyawa tersebut sebesar 202 gr/mol. Tentukan rumus empiris dan rumus molekulnya! (Ar Na = 23; B = 11; O = 16)
Jawab dengan mengikuti contoh dibawah.
RE=A2B5C10
RM=A4B10C20
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3.
OPEN ENDED QUESTION
1 min • 1 pt
Untuk membakar 2 liter gas CxHy diperlukan 10 liter gas oksigen. Jika pada pembakaran itu terbentuk 6 liter CO2sesuai reaksi:
CxHy + O2 → CO2 + H2O (belum setara)
tentukan rumus kimia CxHy!
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4.
OPEN ENDED QUESTION
1 min • 1 pt
Delapan liter campuran gas CH4 dan C3H8 memerlukan 25 liter gas oksigen untuk membakar campuran tersebut sesuai reaksi:
CH4 + 2 O2 → CO2 + 2 H2O
C3H8 + 5 O2 → 3 CO2 + 4 H2O
Tentukan komposisi masing-masing gas tersebut!
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5.
OPEN ENDED QUESTION
1 min • 1 pt
Hitunglah persentase masing masing unsur dalam senyawa Al2(SO4)3 ! (Ar Al = 27; S = 32; O = 16)
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6.
OPEN ENDED QUESTION
1 min • 1 pt
Tentukan jumlah molekul yang terkandung dalam 2 liter gas oksigen pada keadaan standar!
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7.
OPEN ENDED QUESTION
1 min • 1 pt
Sebanyak 12 gram etana (C2H6) dibakar sempurna (Ar C = 12, H = 1), menurut reaksi:
2 C2H6 + 7 O2 → 4 CO2 + 6 H2O
Tentukan volume gas CO2 yang dihasilkan pada keadaan standar (STP)?
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