Unsur krom memiliki nomor massa 52 dan nomor atom 24. Jumlah proton, neutron dan elektron dalam ion Cr3+ berturut-turut adalah ...
Assign 1.SA,V,R,AB

Quiz
•
Chemistry
•
12th Grade
•
Easy
Mega Siagian
Used 7+ times
FREE Resource
16 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
24, 28, dan 24
24, 21, dan 28
52, 28, dan 21
24, 28, dan 21
21, 28, dan 21
2.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
Ion X2- memiliki konfigurasi elektron 1s2 2s2 2p6 3s2 3p6. Dalam sistem periodik, unsur X terletak dalam periode ... dan golongan ... .
3, VIII A
3, VI A
4, VI B
3, VIII B
4, II A
3.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
Bila pada suhu tertentu, laju penguraian N2O5 menjadi NO2 dan O2 adalah sebesar 4.10-5 maka laju pembentukan gas oksigen adalah ...
4.10-5
2.10-5
10-4
8.10-5
6.10-5
4.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
r=k[NO]
r=k[Br2]
r=k[NO][Br2]2
r=k[NO]2[Br2]
r=k[NO][Br2]
5.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Reaksi antara 10,8 gram aluminium (Ar Al=27) dengan 500 ml asam sulfat, H2SO4, 1,8 M akan menghasilkan gas hidrogen sebanyak ... L pada 25oC, 1 atm (RTP).
14,4
9,6
13,44
4,48
21,6
6.
MULTIPLE CHOICE QUESTION
30 sec • 4 pts
Suatu senyawa organik mengandung 72 gram karbon, 12 gram hidrogen dan 64 gram oksigen. Rumus empiris senyawa tersebut adalah ... (Ar H=1, C=12, O=16)
CH2O
C2H4O2
C3H6O2
C3H6O
C4H3O
7.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
- 23
-119
+190
+167
+238
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