RUMUS EMPIRIS DAN RUMUS MOLEKUL
Quiz
•
Chemistry
•
1st Grade
•
Easy
Holisoh Tansah
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5 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Pirimidin tersusun dari 60% karbon, 5% hidrogen, dan sisanya nitrogen (Ar H=1, C=12, N=14). Jika massa molekul relatif pirimidin adalah 80 maka rumus molekulnya adalah ....
C2H2N
C4H4N2
C5H6N
C6H6N3
C3H2N4
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
suatu senyawa tersusun dari 1,2 gram kalsium; 0,62 gram fosfor; dan 1,28 gram oksigen (Ar O =16; P=31; Ca=40) rumus empiris senyawa tersebut adalah ....
Ca3PO3
Ca2P2O8
Ca2P2O5
Ca3P2O8
Ca4P2O8
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Suatu senyawa dengan Mr=80 mengandung 40% massa unsur X (Ar=32) dan sisanya unsur Y (Ar= 16) . rumus molekul senyawa tersebut adalah
XY
XY2
XY3
X2Y
X2Y3
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Senyawa karbon mengandung 40% karbon, 53,33% oksigen dan sisanya hidrogen.jika mr senyawa tersebut 180 maka rumus molekul senyawa tersebut adalah
C6H12O6
C3H4O2
C3H5O2
C3H6O2
C6H8O6
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Di dalam 15,2 gram senyawa oksida kromium terdapat 10,4 gram kromium. jika Ar Cr =52 dan O=16, maka rumus empiris oksida kromium adalah ...
CrO
CrO2
Cr2O
Cr2O3
Cr3O4
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