
Chemistry Questions
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Science
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Practice Problem
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Hard
EVA WINTA
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6 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 10 pts
Berapa gram massa 2 mol gas amonia (NH3), jika diketahui Ar N = 14 dan H= 1
28
32
34
36
2.
MULTIPLE CHOICE QUESTION
10 mins • 10 pts
Logam magnesium direaksikan dengan asam klorida sehingga terjadi 2,8 liter gas hidrogen (STP). Hitunglah massa logam Mg yang bereaksi dengan HCl!
8 g
5 g
4 g
2 g
3.
MULTIPLE CHOICE QUESTION
5 mins • 10 pts
Senyawa Asam Sulfat massa 49 gram direaksikan dengan 20 gram Natrium Hidroksidaa. Berapakah mol pereaksi yang bersisa?
0.25 mol
0,5 mol
1 mol
2 mol
4.
MULTIPLE CHOICE QUESTION
5 mins • 10 pts
Senyawa Asam Sulfat massa 49 gram direaksikan dengan 20 gram Natrium Hidroksida, dengan persamaan reaksi H2SO4 + NaOH ---> Na2SO4 + H2O Berapakah gram Na2SO4 yang dihasilkan?
20 g
35 g
35,5 g
55 g
5.
MULTIPLE CHOICE QUESTION
10 mins • 10 pts
Jika reaksi antara 6 gram etana, C2H6 (Mr = 30) dengan 7,1 gram Cl2 (Mr = 71) menghasilkan 5,16 gram C2H5Cl (Mr = 64,5) dengan persamaan reaksi C2H6 + Cl2 → C2H5Cl + HCl, tentukan persentase rendemen etil klorida
50%
60%
70%
80%
6.
MULTIPLE CHOICE QUESTION
10 mins • 10 pts
Untuk menentukan air kristal terdapat dalam senyawa CuSO4. x H2O, maka 4,99 gram CuSO4. x H2O dipanaskan hingga membentuk CuSO4 anhidrat (CuSO4 tidak mengandung air) sebanyak 3,19 gram. Berapa jumlah air kristal dalam CuSO4. x H2O?
5
6
7
8
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