
Hukum Dasar Kimia (2)
Authored by Fuji Rahayu
Chemistry
9th - 12th Grade
Used 1+ times

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6 questions
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1.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
Sejumlah logam besi dipijarkan dengan 3,2 gram belerang menghasilkan 8,8 gram senyawa besi(II) sulfida. Berapa gram logam besi yang telah bereaksi?
5,6 gram
7 gram
9 gram
5,2 gram
2.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
Sebanyak 18 gram glukosa dibakar dengan oksigen menghasilkan 26,4 gram gas karbon dioksida dan 10,8 gram uap air. Berapa gram oksigen yang telah bereaksi pada pembakaran tersebut?
20,1 gram
19, 2 gram
14 gram
21,5 gram
3.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
Serbuk magnesium yang massanya 3 gram tepat habis bereaksi dengan sejumlah serbuk belerang menghasilkan senyawa magnesium sulfida yang massanya 7 gram. Tentukan massa serbuk belerang yang telah bereaksi!
3 gram
8 gram
1 gram
3,4 gram
4.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
Unsur A dan unsur B dapat membentuk 3 senyawa. Jika kadar massa A di dalam senyawa I = 15%, pada senyawa II = 30%, dan pada senyawa III = 45%; hitunglah perbandingan massa B di dalam ketiga senyawa tersebut untuk massa A tetap.
1:2:3
5:7:10
5:2:1
7:3:1
5.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
Setiap 2 liter gas nitrogen tepat habis bereaksi dengan 3 liter gas oksigen menghasilkan 1 liter gas oksida nitrogen. Jika volume diukur pada suhu dan tekanan yang sama, tentukan rumus molekul oksida nitrogen tersebut.
N4O2
H2O
HBr
N2O3
6.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
Suatu senyawa X memiliki rumus empiris CH2O. Jika diketahui massa molekul relatif (Mr) senyawa X adalah 60, tentukan rumus molekul senyawa tersebut. (Ar C = 12, Ar H = 1, Ar O = 16).
(CH2O)2
(NaCl)3
NO2H4
K2O3
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