
ASESSMEN KONSEP MOL
Authored by Darniati Darni
Chemistry
11th Grade
Used 3+ times

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11 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Sebuah unsur memiliki dua isotop stabil, yaitu Isotop X-1 dengan kelimpahan 75% dan massa atom relatif 35, serta Isotop X-2 dengan kelimpahan 25% dan massa atom relatif 37. Maka massa atom relatif rata-rata unsur tersebut adalah ….
35,50
35,25
36,00
35,75
34,50
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Diketahui Ar Mg = 24, Ar N = 14, Ar O = 16. Maka Mr dari senyawa Mg(NO3)2 adalah ….
116
128
148
164
180
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Pupuk urea merupakan kebutuhan yang sangat dibutuhkan oleh petani.urea memiliki rumus senyawa CO ( NH2 )2 dengan Mr sama dengan 60, jika massa 48 gram.maka jumlah mol urea adalah ….
0,2 mol
0,4 mol
0,6 mol
0,8 mol
1,0 mol
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Jika diketahui 0,25 mol N2H4.L=6,02 x 1023molekul/mol.maka dalam N2H4 terdapat molekul sebanyak ….
14 x 1023molekul
15 x 1024molekul
16 x 1023molekul
17 x 1023molekul
18 x 1024molekul
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Amonia memiliki banyak peran penting di alam dan di industri dalam bentuk gas dengan bau yang tajam dan khas,maka Volume 3,4 gram gas amonia ( NH3 Mr= 17 ), pada keadaan bukan standar / RTP adalah ….
4,8 Liter
3,8 liter
2,8 liter
1,8 liter
0,8 liter
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Volume dari 2 mol gas metana pada tekanan 2 atmosfer dan suhu 27® C adalah …. ( R= 0,82 L.atm/mol.K )
24, 6 Liter
26, 6 Liter
28,6 Liter
30, 6 Liter
32, 6 Liter
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Gas amonia sebanyak 2,24 L ( STP ) direaksikan dengan 3,2 gram gas oksigen.Reaksinya:
4NH3 ( g ) + 5O2 ( g )→ 4NO ( g ) + 6H2O ( g ) . Yang merupakan pereaksi pembatas adalah …. ( Mr O2= 32 )
4NH3
5O2
4NO
6H2O
4NH3 dan 5O2
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