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Kuis Kimia: Tantangan Belajar

Froggy Jumps

Played 3

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Uji konsep kimia menengah

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Kuis Kimia: Tantangan Belajar
 

Froggy Jumps

Kuis Kimia: Tantangan BelajarOnline version

Uji konsep kimia menengah

by Sitti Faridah Dahlan
1

Sebanyak 16 mol logam Fe direaksikan dengan gas oksigen sesuai persamaan reaksi kimia berikut: Fe(s) + O2(g) → Fe2O3(s) (belum setara) Berapa massa O2 yang diperlukan dan jumlah mol Fe2O3 yang dihasilkan?

2

Sebanyak 5,85 gram NaCl bereaksi dengan H2SO4 membentuk Na2SO4 dan HCl. Reaksinya: HCl(s) + H2SO4(aq) → Na2SO4(aq) + HCl(aq) (belum setara) Berapa massa Na2SO4 yang terbentuk?

3

Perhatikan reaksi berikut! N2(g) + H2(g) → NH3(s) (belum setara) Jika 4 mol N2 dan 6 mol H2 direaksikan, jumlah mol NH3 yang dihasilkan adalah...

4

Bila 16,8 gram besi direaksikan dengan 6,4 gram belerang dengan persamaan reaksi: Fe(s) + S(g) → FeS(s) Massa FeS yang dihasilkan adalah (Ar Fe = 56, S = 32)

5

2Fe2S3 + 3O2(aq) + 6H2O → 4Fe(OH)3 + 6S Direaksikan 2 mol Fe2S3, 2 mol O2, dan 3 mol H2O. Jika didapatkan hasil actual 100 gram Fe(OH)3 dan 50 gram S, rendemen reaksi dari Fe(OH)3 dan S berturut-turut Adalah (Mr = Fe(OH)3 = 107, Ar S = 32)

6

Dalam sebuah proses industri NH3, diproduksi melalui reaksi antara gas N2dan H2. Jika sebanyak 560 g N2 direaksikan dengan 150 gram H2, setelah reaksi selesai didapatkan 612 g NH3. Persentase rendemen (hasil) dari reaksi tersebut?

7

Jika diketahui Ar N = 14, O = 16, H = 1, C = 12, massa nitrogen dalam gram urea CO(NH2)2 adalah…

8

Massa NaCl yang mengandung 196,58 gram natrium (Ar Na = 23) dan Cl = 35,5) Adalah...

9

Pada pembakaran sampel 20 gram ZnS dihasilkan 16 gram sulfur dioksida. Persentase belerang yang terdapat pada sampel adalah…

10

Suatu biji besi mengandung besi Fe3O4. Dari 50 gram biji tersebut dapat diperoleh 16,8 gram besi. Kadar % Fe3O4 dalam biji tersebut Adalah (Ar Fe= 56, O= 16)

11

Sebanyak 2,4 g cuplikan yang mengandung belerang Dibakar sempurna sehingga menghasilkan gas SO3. Jima volume gas SO3 yang dihasilkan sebanyak 1008 ml (STP), kadar belerang dalam cuplikan sebesar…

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