PERSIAPAN OSN PART 3

PERSIAPAN OSN PART 3

12th Grade

30 Qs

quiz-placeholder

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PERSIAPAN OSN PART 3

PERSIAPAN OSN PART 3

Assessment

Quiz

Chemistry

12th Grade

Practice Problem

Medium

Created by

Evie Berlianti Hermina

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30 questions

Show all answers

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

Media Image

2.

MULTIPLE CHOICE QUESTION

45 sec • 4 pts

Dari senyawa berikut, mana yang memiliki %massa N tertinggi?

NH3

N2H4

HNO3

NH4NO3

NO2

Answer explanation

Media Image

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

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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

Media Image

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

Media Image

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

Media Image

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

Media Image

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