Jika diketahui Ar : Al = 27; S = 32 dan O = 16, Mr Al2(SO4)3 sebesar . . . .
asessmen diagnostik kognitif

Quiz
•
Chemistry
•
KG - 12th Grade
•
Hard
Cintya Nirwesthi
Used 29+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
123
150
214
310
342
2.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
Jumlah mol dari 29,8 gram amonium fosfat ((NH4)3PO4) (Ar N = 14, H = 1, dan P = 31) adalah … .
0,05 mol
0,15 mol
0,20 mol
0,25 mol
1,10 mol
3.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
Jika diketahui Ar Ca = 40, C = 12, O = 16 dan bilangan Avogadro = 6,02×1023, maka 50 gram CaCO3 mempunyai jumlah molekul … .
3,01 × 1021
3,01 × 1022
6,02 × 1022
3,01 × 1023
1,204 × 1023
4.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
Jika Ar C = 12 dan O = 16, maka volume dari 8,8 gram gas CO2 pada keadaan standar (STP) adalah … .
2,24 liter
4,48 liter
6,72 liter
8,96 liter
22,4 liter
5.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
Massa dari 4,48 liter gas X2 pada keadaan standar (STP) adalah 14,2 gram. Massa atom relatif unsur X tersebut adalah ... .
35,5
71
105,5
142
213
6.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
Pada suhu dan tekanan tertentu, 5 liter gas H2 mempunyai massa 0,4 gram. Pada suhu dan tekanan yang sama, 10 liter gas X massanya 28 gram. Jika Ar H = 1, maka massa molekul relatif gas X adalah ... .
30
40
50
60
70
7.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
Di antara molekul berikut, yang mengandung jumlah molekul paling sedikit adalah .... (Ar H = 1, C = 12, O = 16, N = 14)
16 g CO2
8 g O2
4 g CH4
4 g N2
2 g H2
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