
Asesmen Perhitungan Kimia Kelas XI Fase F

Quiz
•
Chemistry
•
9th - 12th Grade
•
Hard
Irmigardis Sikas
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Jika diketahui massa atom unsur Fe = 55,847 sma dan massa 1 atom C-12 = 12,000 sma, maka massa atom relatif Fe adalah…..
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Satu molekul kafein (Mr = 194) yang terdapat dalam kopi dan teh mengandung 28,9% Nitrogen. Jumlah atom Nitrogen dalam 5 molekul kafein adalah ...
A. 20
B.15
C.10
D.4
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Dalam 16 gram gas oksigen (Ar O = 16) terdapat partikel molekul oksigen sejumlah …
A. 1,505 x 1023
B. 3,01 x 1023
C. 6,02 x 1023
D. 24,08 x 1023
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Sebanyak 216 gram bijih perak dilarutkan dalam asam nitrat berlebih. Semua ion Ag+ diendapkan sebagai AgCl dengan penambahan larutan CaCl2 berlebih. Reaksi yang terjadi sebagai berikut.
2AgNO3(aq) + CaCl2(aq) → 2AgCl(s) + Ca(NO3)2(aq)
Jika diperoleh 143,5 gram endapan, kadar perak (Ag) dalam bijih perak tersebut adalah sebesar ... (Ar Ag = 105 gr mol-1; dan Cl = 35,5 gr mol-1)
A. 25 %
B. 50 %
C. 66 %
E. 75 %
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Sebanyak 6 gram gas C2H6 dibakar sempurna menghasilkan gas CO2 dan uap air menurut persamaan reaksi : C2H2(g) + O2(g) → CO2(g) + H2O(g) (belum setara)
Volume gas O2 yang diperlukan pada keadaan standar (STP) adalah … (Ar C = 12 gram/mol; H = 1 gram/mol; dan O = 16 gram/mol)
A. 15,68 liter
B. 13,44 liter
C. 11,20 liter
E. 6,72 liter
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Produksi Urea dilakukan dengan cara mereaksikan amonia dan gas karbon dioksida :
2NH3(g) + CO2(g) → (NH2)2CO(aq) + H2O(l). Sebanyak 2 Liter gas NH3 direaksikan dengan gas CO2 berlebih dalam ruang tertutup pada suhu 300C dan tekanan 1,5 atm. Massa urea yang dihasilkan sebanyak ... (Ar H = 1 gram/mol; C = 12 gram/mol; O = 16 gram/mol; N = 14 gram/mol; R = 0,082 atm.L/mol.K)
A. 36 gram
B. 46 gram
C. 52 gram
D. 65 gram
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Sebanyak 50 cm3 suatu oksida nitrogen terurai menghasilkan 100 cm3 gas NO dan 25 cm3 gas oksigen. Rumus oksida nitrogen tersebut adalah ....
A. N2O4
B. NO2
C. N2O3
D.N2O5
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