Stoikiometri #2

Stoikiometri #2

10th Grade

15 Qs

quiz-placeholder

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Stoikiometri #2

Stoikiometri #2

Assessment

Quiz

Chemistry

10th Grade

Practice Problem

Hard

Created by

Yenny Dwi

Used 361+ times

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15 questions

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1.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Berapa gram FeS2 (Mr = 120) yang kemurniannya 90% harus dibakar untuk memperoleh 2,24 liter SO2 (0°C, 1 atm) berdasarkan reaksi :

4FeS2(s) + 11O2(g) → 2Fe2O3(s) + 8 SO2(g)

5,4 gram

6,0 gram

6,7 gram

12,0 gram

21,6 gram

2.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Ke dalam ruang tertutup yang berisi a mol gas A dimasukkan gas B sehingga terjadi reaksi :

2A + B → A2B. Setelah gas B habis dalam ruang terdapat A2B sebanyak 6 mol. Jumlah gas yang ada dalam ruang tertutup sekarang ….

(a + 2b) mol

(a + b) mol

(a - b) mol

(a - 2b) mol

b mol

3.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Larutan perak nitrat bereaksi dengan larutan seng klorida menurut reaksi

2AgNO3(aq) + ZnCl2(aq) → 2AgCl(s) + Zn(NO3)2(aq)

Maka volume larutan ZnCl2 1 M yang diperlukan untuk menghasilkan AgCl sebanyak 14,35 gram adalah ….

(Ar : Ag = 108, N = 14, O = 16, Cl = 35,5, Zn = 65)

1000 cm³

500 cm³

250 cm³

100 cm³

50 cm³

4.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Tetapan Avogadro : L = 6,02 x 1023 dan Ar : C = 12, O = 16, maka 22 gram gas karbon dioksida mengandung ….

1,32 x 1021 molekul

3,01 x 1021 molekul

6,02 x 1024 molekul

3,01 x 1023 molekul

6,02 x 1023 molekul

5.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Media Image

Prosentase terbanyak dari unsur nitrogen terdapat pada pupuk ….

CO(NH2)2

(NH4)2 SO4

NaNO3

NH4NO3

Ca(NO3)2

6.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Media Image

Diketahui reaksi:

CaCO3(s) + 2HCl(aq) → CaCl2(aq) + H2O(1) + CO2(g)

Jika 5 gram batu kapur direaksikan dengan asam klorida encer, maka pada keadaan STP akan diperoleh gas sebanyak … Liter

(Ar Ca = 40, Cl = 35,5, O = 16, C = 12 dan H = 1)

1,12

2,24

4,48

5,60

11,2

7.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Seng mempunyai dua isotop yaitu 66Zn30 dan 65Zn30. Bila Ar Zn = 65,4 maka perbandingan persentase 66Zn30 dan 65Zn30 adalah ….

80 : 20

75 : 25

40 : 60

50 : 50

30 : 70

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