
Stoikiometri #2
Authored by Yenny Dwi
Chemistry
10th Grade
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
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
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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