Suatu enyawa mempunyai rumus empiris (CHO2)n dengan massa relative 90 (Ar C= 12; H = 1; O = 16), Maka molekul senyawa tersebut adalah…

Latihan Soal XI

Quiz
•
Chemistry
•
11th Grade
•
Hard
Nur Ali Bakar
Used 3+ times
FREE Resource
30 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Piriidin tersusun dari 60 % karbon, 5% hydrogen, san sisanya nitrogen (Ar H = 1, C = 12, N = 14). Jika massa molekul relative pirimidin adalah 80 maka rumus molekulnya adalah…
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Di dalam 15,2 gram senyawa oksida kromium terdapat 10,4 gram kromium. Jika Ar Cr= 52 dan O = 16, maka rumus empiris oksida kromium adalah..
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sebanyak 246 gram kristal magnesium sulfat MgSO4.xH2O dipanaskan sehingga terbentuk kristal MgSO4 sebanyak 120 gram. Menurut reaksi MgSO4.xH2O à MgSO4 (s) + xH2O(g) Rumus senyawa kristal tersebut adalah.. (Ar Mg = 24; S = 32; O = 16)
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pada pemanasan kristal terusi (CuSO4.xH2O) terjadi pengurangan massa dari 24,90 menjadi 15,90 gram sesuai CuSO4 xH2O -----> CuSO4 xH2O. Tentukan rumus kristal terusi tersebut. (Ar Cu = 63, S = 32, O = 16, H = 1)
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Jika kristal barium klorida (Mr= 208) mengandung 14,75 % air kristal (Mr Air = 18) maka rumus kristal barium klorida adalah…
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kristal CaCl2.2H2O yang massanya 7,35 gram dilarutkan ke dalam 20 ml air, kemudian direaksikan dengan larutan H2C2O4 berlebihan sehingga menjadi reaksi berikut. CaCl2 + H2C2O4 ----> CaC2O4 + 2HCl. Massa CaC2O4 yang dihasilkan adalah…. (Ar Ca = 40; Cl = 35,5; C = 12; h = 1; dan o = 16)
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