
HUKUM LAVOSIER
Authored by Musfiah Setyati
Chemistry
1st Grade
Used 12+ times

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15 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Kalsium karbida atau karbit adalah senyawa kimia (dengan rumus kimia CaC2) berbentuk kristal padat berwarna abu-abu kehitaman yang digunakan untuk pembuatan gas acetylene (C2H2), yaitu bahan untuk memotong dan mengelas besi dan baja pada industri perkapalan, pertambangan, karoseri mobil (otomotif) serta industri kecil.
CaC2(s) + 2H 2O (l)--> C 2H2 (g)+ Ca(OH)2(aq)
Jika massa kalsium karbit 20 gram dan massa air 80 gram ,massa larutan kalsium hidroksida 30 gram berapa massa gas asetilen yang dihasilkan....
60 gram
70 gram
80 gram
90 gram
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Suatu reaksi pengenceran : CaO(s) + H2O(l) --> Ca(OH)2(aq)
Jika massa padatan kalsium oksida 30 gram massa larutan kalsium hidroksida yang dihasilkan 80 gram ,massa air adalah ...
20 gram
40 gram
50 gram
60 gram
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Sebanyak 35 gram logam magnesium direaksikan dengan belerang menghasilkan 40 gram padatan magnesium sulfida.Reaksi yang terjadi adalah ...
Mg(s) + S(s) --> MgS
Mg(s) + B(s) --> MgB(s)
Mn(s) +S(s)--> MnS(s)
Mn(s) + B(s) --> MnB(s)
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Pada gambar disamping merupakan proses pembuatan natrium klorida,reaksi pembuatan natrium klorida adalah ...
2Na (s) + Cl2(g)--> 2NaCl(s)
NaOH(aq) + Cl2(g)--> NaCl(s)
2NaOH(aq) + Cl2(g) -->2 NaCl(s) + H2O(g)
2NaOH(aq)+Cl2(g) --> 2NaCl(s)+H2(g) +O2(g)
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
1. 5 gram Oksigen direaksikan dengan 5 gram logam Magnesium sehingga membentuk senyawa Magnesium oksida. Dari reaksi tersebut berapa massa magnesium oksida yang dihasilkan?
1,5 gram
3,5 gram
5 gram
6,5 gram
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Sebuah oksigen memiliki massa 6 gram kemudian direaksikan dengan logam magnesium sehingga membentuk 8 gram senyawa oksida. Berapakah massa magnesium yang bereaksi?
1 gram
2 gram
6 gram
8 gram
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
. Pada pembakaran magnesium yang dilakukan di udara akan dihasilkan zat magnesium oksida. Apabila magnesium yang dibakar sebanyak 0,098 gram menghasilkan 0,162 gram MgO (magnesium oksida). Berapa jumlah massa gas oksigen yang digunakan dalam reaksi tersebut?
0,064 gram
0,098 gram
0.162 gram
0,260 gram
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