
Asesmen formatif ar mr
Authored by jdguru yachh
Chemistry
11th Grade
Used 2+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 10 pts
Massa rata-rata satu atom P adalah 6,64 x 10-23 gram, sedangkan massa satu atom karbon C - 12 adalah 1,992 x 10-23 gram. Massa atom relatif (Ar) untuk unsur P adalah ....
Massa rata-rata satu atom P adalah 6,64 x 10-23 gram, sedangkan massa satu atom karbon C - 12 adalah 1,992 x 10-23 gram. Massa atom relatif (Ar) untuk unsur P adalah ....
2.
MULTIPLE CHOICE QUESTION
20 sec • 10 pts
Sebuah atom X memiliki 15 proton dan 20 neutron. Massa atom rata-rata (Ar) X lebih dekat dengan nilai mana?
15 satuan massa atom
35 satuan massa atom
17,5 satuan massa atom
12 satuan massa atom
3.
MULTIPLE CHOICE QUESTION
45 sec • 10 pts
jika diketahui massa atom unsur Fe = 55,847 sma dan massa 1 atom C-12 = 12,000 sma, maka massa atom relatif Fe adalah …
(1×12,000)/55,847
55,847/ (12,000 × 1)
55,847/ (12 × 12,000)
55,847/ (1/12 x 12,000)
4.
MULTIPLE CHOICE QUESTION
1 min • 10 pts
Bila massa atom relatif Al = 27, S= 32, O=16, dan H=1, maka massa molekul relatif Al2(SO4)3.6H2O adalah
450
402
338
226
5.
MULTIPLE CHOICE QUESTION
45 sec • 10 pts
Berapakah massa relatif dari unsur Amoniak NH3 apabila Ar N = 14 , Ar H = 1?
Berapakah massa relatif dari unsur Amoniak NH3 apabila Ar N = 14 , Ar H = 1?
13
20
17
25
6.
MULTIPLE CHOICE QUESTION
1 min • 10 pts
Rumus kimia suatu senyawa adalah Fe2O3. Jika Mr senyawa tersebut adalah 160 satuan massa atom, berapakah massa atom rata-rata (Ar) Fe?
56
80
112
32
7.
MULTIPLE CHOICE QUESTION
1 min • 10 pts
Jika diketahui massa atom relatif (Ar) Fe = 56, Ca = 40, Ni = 59. Mg = 24.Cu = 63,5, N = 14, dan O = 16.
Jika diketahui massa atom relatif (Ar) Fe = 56, Ca = 40, Ni = 59. Mg = 24.Cu = 63,5, N = 14, dan O = 16.
Senyawa dengan massa molekul relatif (Mr) terkecil adalah ....
Fe(NO3)2
Cu(NO3)2
Ca(NO3)2
Mg(NO3)2
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