
REMIDI STOIKIOMETRI
Authored by Hj. Nur'aini
Chemistry
11th Grade
Used 2+ times

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25 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 4 pts
Kaporit atau kalsium hipoklorit adalah jenis obat penjernih air yang biasa digunakan oleh Perusahaan Daerah Air Minum (PDAM). Senyawa kimia ini sering digunakan sebagai disinfektan air karena dapat membunuh bakteri, kuman, serta virus penyebab penyakit. Kaporit tersedia dalam bentuk serbuk dan bentuk tablet.
Kaporit atau Kalsium hipoklorit adalah senyawa kimia yang memiliki rumus kimia Ca(ClO)₂. Berapa massa molekul relatif Kaporit (jika Ar O = 16 , Cl = 35,5 , Ca = 40)
32
40
71
143
286
2.
MULTIPLE CHOICE QUESTION
3 mins • 4 pts
Reaksi kimia saat pemanasan larutan baking soda tanpa zat asam yang mengeluarkan Natrium karbonat (Na2CO3), gas karbon dioksida (CO2) dan air (H2O) di atas suhu 80 °C (180 °F):
2 NaHCO3 → Na2CO3 + H2O + CO2
Berapa massa molekul relatif Na2CO3 jika Ar C = 12, O = 16 , Na = 23
106
90
84
68
44
3.
MULTIPLE CHOICE QUESTION
3 mins • 4 pts
Jika Ar C = 12 sma; H = 1 sma; O = 16 sma. Maka Mr dari CH3COOH adalah ….
30 sma
45 sma
56 sma
60 sma
70 sma
4.
MULTIPLE CHOICE QUESTION
3 mins • 4 pts
Jika diketahui Ar Se = 79 berapa mol atom Se yang memiliki massa 27,65 gram ….
0,15 mol
0,25 mol
0,35 mol
0,45 mol
0,55 mol
5.
MULTIPLE CHOICE QUESTION
3 mins • 4 pts
Berapa gram CO₂ yang dihasilkan dari 1 mol C yang dibakar sempurna?
(Mr C = 12, O = 16)
22 gram
28 gram
44 gram
32 gram
12 gram
6.
MULTIPLE CHOICE QUESTION
3 mins • 4 pts
Di laboratorium terdapat gas O2 sebanyak 224 mL pada keadaan STP yang ditampung dalam sebuah tangki. Berapa mol gas tersebut ?
0,01 mol
0,1 mol
1,0 mol
1,5 mol
10 mol
7.
MULTIPLE CHOICE QUESTION
3 mins • 4 pts
Volume 2 mol gas oksigen (O₂) pada STP adalah…
11,2 L
22,4 L
44.8 L
33,6 L
2,24 L
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