TC251019A1-Chem
Quiz
•
Chemistry, Science
•
10th - 12th Grade
•
Practice Problem
•
Hard
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10 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Massa air yang dihasilkan dari reaksi 25 gram udara (mengandung 20% berat oksigen) dengan gas propana adalah …
2,25 g
3,60 g
11,20 g
18 g
25 g
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Senyawa kimia pertama dari unsur gas diperoleh pada 1962. Sejak itu beberapa senyawa diperoleh dan dikarakterisasi. Rumus empiris senyawa yang terdiri dari
67,2% Xe dan 32,8% O.
Jika berat atom Xe = 131,24 ; O =16
XeO
XeO2
XeO3
XeO4
XeO5
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Senyawa berikut yang dapat membentuk ikatan hidrogen antarmolekul adalah …
1) HF
2) CH3CH2OH
3) H2O
4) CH3OCH3
A
B
C
D
E
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Gas A dengan tekanan 4 atm diberi katalis sehingga terurai menjadi gas B.
Tekanan total campuran gas-gas pada kesetimbangan adalah …
2 atm
4 atm
5 atm
6 atm
8 atm
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Untuk memperoleh larutan dengan konsentrasi tepat 0,5 molal, maka 125 gram CuSO4.5H2O (H= 1, O= 16, S= 32, Cu= 64) dilarutkan dalam air sebanyak …
500 g
875 g
910 g
955 g
1000 g
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Asam metanoat memberikan endapan merah jika ditetesi larutan Fehling.
SEBAB
Asam metanoat mengandung gugus karboksil.
A
B
C
D
E
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Dari data:
Dapat dihitung dari entalpi pembentukan sebesar …
-984 KJ/mol
-1161 KJ/mol
-856 KJ/mol
-1904 KJ/mol
-1966 KJ/mol
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