
STOIKIOMETRI XI
Quiz
•
Chemistry
•
11th Grade
•
Medium
Eka Julia
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10 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Jumlah mol zat dari 6 gram logam Magnesium (Ar Mg = 24) adalah ...
0,125 mol
0,250 mol
0,500 mol
0,750 mol
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Senyawa berikut yang mengandung jumlah molekul terbanyak adalah ...
(Ar C = 12, Ar H =1, Ar Br = 80)
1 gram CH4
1 gram CH3Br
1 gram CH2Br2
1 gram CHBr3
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Jumlah mol urea yang terdapat dalam 3,011 x 1024 molekul CO(NH2)2 adalah ...
2 mol
20 mol
5 mol
50 mol
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Asam benzoat, C7H6O2 (atau C6H5COOH), adalah padatan kristal berwarna putih dan merupakan asam karboksilat aromatik yang paling sederhana. Nama asam ini berasal dari gum benzoin (getah kemenyan), yang dahulu merupakan satu-satunya sumber asam benzoat. Asam lemah ini beserta garam turunannya digunakan sebagai pengawet makanan. Asam benzoat adalah prekursor yang penting dalam sintesis banyak bahan-bahan kimia lainnya.
Massa molar Asam benzoat adalah ... (Ar C = 12, Ar H = 1, Ar O = 16)
82
112
122
132
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Massa dari 1,5 mol perak adalah ...
(Ar Ag = 108)
100 gram
126 gram
142 gram
162 gram
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Sebanyak 11 gram gas CO2 diukur pada keadaan STP.
Volume gas CO2 tersebut adalah ...
(Mr CO2 = 44)
2,8 L
5,6 L
11,2 L
22,4 L
7.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
Bahan penyedap makanan monosodium glutamat (MSG) mempunyai susunan 13,6% Na, 35,5% C, 4,8% H, 8,3% N, dan 37,7% O (Ar Na = 23; C = 12; H = 1,01; N = 14,01; O = 16). Tentukan rumus empiris MSG tersebut!
NaC5H8NO4
NaC7H10NO4
Na2C5H8NO4
Na2C6H8NO4
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