
Stokiometri _XI 3
Authored by emmimosa arunmba
Chemistry
11th Grade
Used 2+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
Wawan sedang melakukan eksperimen kimia di laboratoriumnya. Ia ingin menciptakan reaksi a Al2S3 + b H2O + c O2 → d Al(OH)3 + e S. Supaya reaksi tersebut setara, maka harga koefisien reaksi a, b, c, d, dan e berturut-turut adalah .....
2, 6, 3, 4, dan 6
1, 3, 2, 2, dan 3
2, 6, 4, 2, dan 3
4, 6, 3, 4, dan 12
2.
MULTIPLE CHOICE QUESTION
45 sec • 10 pts
Faisal sedang melakukan eksperimen di laboratorium dengan mencampurkan NaOH dan HCl. Reaksi yang terjadi adalah NaOH + HCl → NaCl + H2O. Yang merupakan pereaksi dalam eksperimen ini adalah .....
NaOH dan H2O
HCl dan H2O
NaCl dan H2O
NaOH dan HCl
3.
MULTIPLE CHOICE QUESTION
5 mins • 20 pts
Maya sedang melakukan eksperimen di laboratorium dengan menggunakan 11,2 gram serbuk besi (Fe) dan 6,4 gram serbuk belerang (S). Ia mencampurkan kedua bahan tersebut sesuai reaksi:
Fe + S → FeS
Setelah proses pemanasan yang sempurna, senyawa besi(II) sulfida (FeS) yang terbentuk sebanyak .....
6,4 gram
11,2 gram
12,8 gram
17,6 gram
4.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
Faisal sedang melakukan eksperimen di laboratorium dan ia memiliki 1,204 × 1022 molekul NH3 (Ar N = 17 dan H = 1). Ia ingin mengetahui massa dari molekul tersebut. Massa dari 1,204 × 1022 molekul NH3 adalah .....
0,17 gram
3,40 gram
1,70 gram
0,34 gram
5.
MULTIPLE CHOICE QUESTION
5 mins • 10 pts
Angga melakukan percobaan di laboratorium untuk menentukan massa dari 4,48 liter gas X2 pada keadaan standar (STP). Setelah melakukan pengukuran, ia menemukan bahwa massa gas tersebut adalah 14,2 gram. Dengan informasi ini, massa atom relatif unsur X yang ia teliti adalah ....
71
142
35,5
105,5
6.
MULTIPLE CHOICE QUESTION
5 mins • 10 pts
Angga sedang melakukan percobaan di laboratorium untuk menentukan volume gas. Ia memiliki 8 gram SO3 (Ar S = 32 dan O = 16) dan ingin mengetahui volume gas tersebut pada suhu 30 °C dan tekanan 1 atm (R = 0,082). Volume dari gas tersebut adalah ....
1,24 liter
6,12 liter
5,24 liter
2,48 liter
7.
MULTIPLE CHOICE QUESTION
5 mins • 10 pts
Rizky is conducting an experiment in his chemistry lab. He knows that the atomic masses are Ar Ca = 40, C = 12, O = 16 and Avogadro's number is 6,02×1023. He has 50 grams of CaCO3 and wants to find out how many molecules are present in it. Can you help him calculate the number of molecules in 50 grams of CaCO3?
3,10 × 1023
6,02 × 1022
3,01 × 1021
1,204 × 1023
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