
Latihan Chemistry
Authored by Dwita Rihsanny
Chemistry
12th Grade

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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 10 pts
Pada pembakaran 12 gram suatu senyawa karbon dihasilkan 22 gram gas CO2 (Ar C = 12, O = 16). Unsur karbon dalam senyawa tersebut adalah sebesar ....
23%
27%
50%
55%
77%
2.
MULTIPLE CHOICE QUESTION
1 min • 10 pts
Pembakaran senyawa hidrokarbon CxHy dalam oksigen berlebih menghasilkan 220 mg CO2 (Mr = 44) dan mg H2O (Mr = 1. Jika Ar C = 12 dan H = 1 maka rumus empiris senyawa tersebut adalah ....
C2H
CH2
CH3
C2H5
CH
3.
MULTIPLE CHOICE QUESTION
1 min • 10 pts
Sejumlah 3,2 gram gas metana dibakar dengan 16,0 gram oksigen. Gas karbon dioksida yang terbentuk adalah ....
2,24 gram
4,40 gram
8,80 gram
8,96 gram
17,6 gram
4.
MULTIPLE CHOICE QUESTION
1 min • 10 pts
Bila 60 gram logam A yang bervalensi 2 direaksikan dengan asam klorida, akan dihasilkan 56,0 liter gas hydrogen (1 mol gas = 22,4 L). Massa atom relatif A adalah ....
65
40
39
24
23
5.
MULTIPLE CHOICE QUESTION
1 min • 10 pts
Untuk oksidasi sempurna 1 liter campuran yang terdiri atas 60% metana (CH4) dan 40% etana (C2H6), dibutuhkan O2 murni sebanyak ....
2,4 liter
2,6 liter
2,8 liter
3,0 liter
3,2 liter
6.
MULTIPLE CHOICE QUESTION
1 min • 10 pts
Jika 100 cm3 dari setiap gas dibawah ini dipanaskan dalam oksigen yang berlebihan, maka gas yang menghasilkan gas CO2 terbanyak (diukur pada suhu dan tekanan yang sama) adalah ....
CO
C2H6
C2H2
CH4
C3H8
7.
MULTIPLE CHOICE QUESTION
1 min • 10 pts
Jika 100 cm3 suatu oksida nitrogen terurai dan menghasilkan 100 cm3 nitrogen (III) oksida dan 50 cm3 oksigen (semua volum gas diukur pada suhu dan tekanan yang sama), maka oksida nitrogen tersebut adalah ....
NO
NO2
N2O
N2O4
N2O5
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