stoikiometri
Quiz
•
Chemistry
•
10th Grade
•
Medium
Larosa Arupa
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15 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Jika 38 gram MgSO4.xH2O dipanaskan, dihasilkan 20 gram garam anhidrat sesuai dengan persamaan reaksi:
MgSO4.xH2O --> MgSO4 + xH2O
Jika diketahui Mr MgSO4 = 120, nilai x adalah ....
2
3
4
5
6
2.
MULTIPLE SELECT QUESTION
5 mins • 1 pt
2 L gas propana (C3H8) dibakar dengan 12 L gas oksigen sehingga terbentuk CO2 dan H2O. Uap air kemudian diembunkan dan dievakuasi dari reaktor.
Pernyataan berikut ini yang tidak sesuai adalah … .
Propana berperan sebagai pereaksi pembatas
Terdapat 8 L air yang dievakuasi
2 L gas oksigen tidak bereaksi
Tidak ada sisa reaktan dalam reaksi
Gas CO2 yang dihasilkan sebanyak 6 L
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
10 gram batu kapur (CaCO3) direaksikan dengan asam klorida menghasilkan gas karbon dioksida. Berapakah massa maksimum karbon dioksida yang dihasilkan?
Ar C = 12; O = 16; Ca = 40; H = 1; Cl = 35,5)
CaCO3 (s)+ 2 HCl (aq) → CaCl2 (aq) + H2O (l) + CO2 (g)
2,8 gram
4,4 gram
5,6 gram
7,2 gram
8,8 gram
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Diketahui persamaan reaksi:
C (s) + 2 H2 (g) --> CH4 (g)
Jika sejumlah karbon tepat bereaksi dengan 2,24 L gas H2 pada STP, jumlah partikel gas CH4 yang dihasilkan adalah .... molekul
3,01 x 1020
3,01 x 1021
3,01 x 1022
6,02 x 1024
12,04 x 1024
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Suatu bahan makanan terdiri dari 3 unsur yaitu unsur C, H, dan O. Bahan makanan ini memiliki komposisi 36 gram C, 5 gram H, dan 64 gram O. Maka rumus empiris bahan makanan tersebut adalah .... (Ar C = 12, H = 1, O = 16)
C6H10O8
C3H5O4
C8HO14
C4H6O12
C2H3O6
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Prosentase terbanyak dari unsur nitrogen terdapat pada pupuk ….
Ar H=1, C=12, N=14, O=16, Na=23, S=32, Ca=40
CO(NH2)2
(NH4)2 SO4
NaNO3
NH4NO3
Ca(NO3)2
7.
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 mililiter
500 mililiter
250 mililiter
100 mililiter
50 mililiter
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