
Level Check Test - Rumus Empiris,Rumus Molekul
Authored by Hananda Fadzillah
Chemistry
10th Grade
Used 1+ times

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6 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Suatu bahan makanan terdiri dari 3 unsur yaitu unsur C, H, dan O. Bahan makanan ini memiliki komposisi 72 gram C, 10 gram H, dan 128 gram O. Maka rumus empiris bahan makanan tersebut adalah .... (Ar C = 12, H = 1, O = 16)
C2H5O
C3H5O
C6H10O2
C6H10O4
2.
MULTIPLE CHOICE QUESTION
1 min • 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 ....
Ca2P2O5
Ca2P2O8
Ca3P2O8
Ca3P4O5
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Seorang peneliti menemukan suatu senyawa yang mengandung 6 gram unsur H, 320 gram unsur S dan 64 gram unsur O. Jika Ar H = 1, S = 32, O = 16, maka rumus molekul senyawa tersebut adalah ....
C6H10O4
C6H10O2
C3H2O16
C3H5O
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
1. 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
C3H2N4
C4H4N2
C5H6N
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
1. 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
X3Y
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Sebuah senyawa terdiri dari 40% karbon (Ar = 12), 6,67% hidrogen (Ar = 1), dan sisanya oksigen (Ar = 16). Berapakah rumus empiris senyawa tersebut?
CHO
CH2O
C2H4O2
C3H6O3
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