
Quis Stoikiometri
Quiz
•
Chemistry
•
11th Grade
•
Practice Problem
•
Hard
Endah Fauziah
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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Diketahui reaksi NaOH + HCl → NaCl + H2O.
Yang merupakan pereaksi adalah ….
NaOH dan H2
NaOH dan H2O
NaCl dan H2O
NaOH dan HCl
HCl dan H2O
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pada suhu dan tekanan tertentu, 10 liter gas NO bereaksi dengan 5 liter gas O2, sehingga menghasilkan 10 liter gas NxOy pada suhu dan tekanan yang sama. Rumus molekul senyawa NxOy adalah …
NO2
N2O5
N2O4
N2O
N2O3
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Diketahui reaksi: aH2SO4 (aq) + bKOH(aq) ➝ cK2SO4 (aq) + dH2O(l)
Nilai a : d adalah …
1 : 2
1 : 1
2 : 1
1 : 4
4 : 1
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Jumlah molekul dari 3,2 gram SO2 adalah …
6,022 × 1020 molekul
3,011 × 1021 molekul
1,005 × 1022 molekul
3,011 × 1022 molekul
6,022 × 1023 molekul
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Jika diketahui massa atom relatif (Ar) H = 1, S = 32, O = 16 dan massa molekul relatif (NH4)2SO4 = 132, maka massa atom relatif (Ar) N adalah … .
7
20
28
14
12
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Jika diketahui Ar Ca = 40, C = 12, O = 16 dan bilangan Avogadro = 6,02×1023, maka 50 gram CaCO3 mempunyai jumlah molekul …
3,01 × 1021
3,01 × 1023
3,01 × 1022
1,204 × 1023
6,02 × 1022
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Dalam 100 gram senyawa terdapat 40% kalsium, 12% karbon, dan 48% oksigen. Jika Ar Ca = 40, C = 12, dan O = 16, maka rumus empiris senyawa tersebut adalah ...
CaCO
CaCO2
CaC2O
CaC3O
CaCO3
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