PERSIAPAN OSN PART 3
Quiz
•
Chemistry
•
12th Grade
•
Practice Problem
•
Medium
Evie Berlianti Hermina
Used 3+ times
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30 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 4 pts
Berapa jumlah atom O yang ada dalam satu mol senyawa MgFe2O4?
2
4
1,204 x 1024
2,408 x 1024
4,916 x 1024
Answer explanation
2.
MULTIPLE CHOICE QUESTION
45 sec • 4 pts
Dari senyawa berikut, mana yang memiliki %massa N tertinggi?
NH3
N2H4
HNO3
NH4NO3
NO2
Answer explanation
3.
MULTIPLE CHOICE QUESTION
45 sec • 4 pts
Mana yang memiliki jumlah partikel terbanyak?
100 g CaCl2
1 mol CH3COOH
13 L gas CO2 dalam 1,5 atm dan 25°C
8,022 x 1021 partikel Au
20 L gas H2 dalam STP
Answer explanation
4.
MULTIPLE CHOICE QUESTION
45 sec • 4 pts
Diketahui pembakaran 1 mol suatu hidrokarbon menghasilkan 132 g CO2 dan 97,744 L H2O dalam 1 atm 25°C, tentukan rumus molekul hidrokarbon tersebut!
CH4
C2H6
C3H8
C3H6
C3H4
Answer explanation
5.
MULTIPLE CHOICE QUESTION
45 sec • 4 pts
Diketahui suatu senyawa mengandung %massa N sebesar 25,9% dan % massa O sebesar 74,1%, rumus empiris dari senyawa tersebut adalah
NO
N2O
NO2
N2O5
N2O3
Answer explanation
6.
MULTIPLE CHOICE QUESTION
45 sec • 4 pts
2,5 gram sampel hidrokarbon dibakar sempurna menghasilkan 8,46 g CO2 dan 1,73 g H2O, tentukan rumus empiris hidrokarbon tersebut!
CH
CH2
CH3
CH4
C3H8
Answer explanation
7.
MULTIPLE CHOICE QUESTION
45 sec • 4 pts
Jika digunakan Cu2+ sebanyak 4 mol dan terdapat I- berlebih dalam larutan, berapa mol S2O32- yang diperlukan untuk menghilangkan tepat semua I3- yang dihasilkan?
1 mol
2 mol
4 mol
8 mol
12 mol
Answer explanation
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