Post Test Stoikiometri dan Hukum Dasar Kimia
Quiz
•
Chemistry
•
9th - 12th Grade
•
Hard
Used 1+ times
FREE Resource
19 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
3 mins • 3 pts
Jika 0,24 gram zat yang mengandung karbon memerlukan 112 mL oksigen (STP) untuk membakar semua karbonnya, persentase karbon (Ar C = 12) dalam zat tersebut adalah…
25%
39%
56%
75%
80%
2.
MULTIPLE CHOICE QUESTION
3 mins • 3 pts
Jumlah kalsium oksida yang diperlukan untuk bereaksi sempurna dengan 5 mol asam fosfat sesuai reaksi yang belum setara: CaO + H3PO4 → Ca3(PO4)2 + H2O adalah…
1 mol
2 mol
3 mol
7,5 mol
15 mol
3.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
Reaksi yang terjadi antara KClO3 dan HCl adalah: KClO3 + 6HCl → KCl + 3H2O + 3Cl2. Jika diketahui Ar K = 39, Cl = 35,5, O = 16 dan H = 1, untuk memperoleh 142 gram Cl2 diperlukan KClO3 sebanyak…
122,5 gram
81,7 gram
61,3 gram
40,8 gram
24,5 gram
4.
MULTIPLE CHOICE QUESTION
3 mins • 3 pts
Reduksi besi(III) oksida dengan CO menghasilkan besi menurut persamaan reaksi: Fe2O3(s) + 3CO(g) → 2Fe(s) + 3CO2(g) Untuk menghasilkan 11,2 kg besi (Ar Fe = 56) diperlukan besi (III) oksida sebanyak…(Mr Fe2O3 = 160)
22 kg
20 kg
18 kg
16 kg
15 kg
5.
MULTIPLE CHOICE QUESTION
3 mins • 4 pts
Sebanyak x gram FeS (Mr = 88) direaksikan dengan asam klorida menurut reaksi: FeS + 2HCl → FeCl2 + H2S. Pada akhir reaksi diperoleh 2 liter gas H2S. Jika pada keadaan tersebut 1 mol gas H2S bervolum 20 liter, nilai x adalah…
8,8 gram
17,6 gram
26,4 gram
35,2 gram
44,0 gram
6.
MULTIPLE CHOICE QUESTION
3 mins • 3 pts
Pembakaran sempurna 0,2 gram senyawa hidrokarbon menghasilkan 0,66 gram CO2 (Mr = 44) dan 0,18 gram H2O (Mr = 18). Rumus empiris senyawa tersebut adalah…
CH3
C2H6
C3H2
C3H4
C3H8
7.
MULTIPLE CHOICE QUESTION
3 mins • 3 pts
Belerang dapat dibuat dari gas alam dengan mengoksidasi gas H2S sesuai dengan reaksi berikut yang belum setara: H2S + O2 → S + H2O. Banyaknya belerang yang dapat diperoleh dengan mengoksidasi 224 L H2S pada STP adalah…(Ar S = 32)
10 gram
32 gram
160 gram
224 gram
320 gram
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