Stoikiometri #4
Quiz
•
Chemistry
•
10th Grade
•
Practice Problem
•
Medium
Yenny Dwi
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Logam M bereaksi dengan gas halogen (X2) membentuk senyawa ionik dengan rumus empiris MX2. Senyawa MBr2 dapat diubah secara sempurna menjadi MCl2 jika direaksikan dengan Cl2 sesuai persamaan reaksi:
MBr2 + Cl2 → MCl2 + Br2
Jika 2,00 gram MBr2 (Ar Br=80) yang direaksikan dengan Cl2 menghasilkan 1,11 gram MCl2 (Ar Cl=35,5), maka massa atom relatif logam M adalah ....
17,8
20,1
40,0
89,0
137,3
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Prosentase terbanyak dari unsur nitrogen terdapat pada pupuk ….
Ar H=1, C=12, N=14, O=16, Na=23, S=32, Ca=40
CO(NH2)2
(NH4)2 SO4
NaNO3
NH4NO3
Ca(NO3)2
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Larutan Iodium sebanyak 10 ml dapat dihilangkan warnanya oleh 20 ml 0,1 M Na2S2O3. Molaritas larutan Iodium tersebut adalah ….
0,05 M
0,10 M
0,20 M
1,0 M
2,0 M
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pada reaksi 27 gram kalsium dengan 5,6 gram nitrogen dihasilkan kalsium nitrida menurut persamaan reaksi:
3 Ca(S) + N2 → Ca3N2(S).
Massa kalsium nitrida yang dihasilkan ….
(Ar Ca = 40, N = 14)
14,8 gram
29,6 gram
44,4 gram
68,0 gram
148,0 gram
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sebanyak 34,2 gram Al2(SO4)3 dilarutkan dalam air hingga volumenya menjadi 250 ml. Konsentrasi larutan tersebut adalah …. (Ar : Al = 27; S = 32; dan O =16)
0,04 M
0,1 M
0,4 M
1 M
4 M
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sebanyak 5,3 gram natrium karbonat (Mr = 106) bereaksi dengan asam klorida berlebihan menurut reaksi :
Na2CO3(s) + 2 HCl(aq) → 2 NaCl(aq) + H2O (l) + CO2(g)
Pada suhu dan tekanan sama 1 liter gas NO massanya 1 gram. Gas CO2 yang dihasilkan mempunyai volume ….
(Ar : N = 14, O = 16)
0,05 liter
0,10 liter
0,20 liter
0,30 liter
1,50 liter
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Massa Na3PO4 yang terbentuk bila 4,34 gram Na2O direaksikan dengan 3,92 gram H3PO4 menurut reaksi:
Na2O + H3PO4 → Na3PO4 + H2O
adalah ... gram
1,64
3,28
4,92
6,56
8,20
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