Post-Test Stoikiometri

Quiz
•
Chemistry
•
9th - 12th Grade
•
Easy
Eni Yunita
Used 1+ times
FREE Resource
9 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 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
Ca2P2O5
Ca4P2O8
Ca2P2O8
Ca3P2O8
2.
MULTIPLE CHOICE QUESTION
30 sec • 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
C5H6N
C3H2N4
C4H4N2
C6H6N3
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Dalam 100 gram pupuk urea (CO(NH2)2) terdapat 22,4 gram nitrogen (Ar C = 12, O =16, N = 14, H = 1). Kadar nitrogen dalam pupuk urea tersebut adalah … %
96
48
44.8
23.3
22.4
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Massa glukosa (C6H12O6) yang harus dilarutkan dalam 500 mL air untuk membuat larutan glukosa (C6H12O6) 0,2 M (Ar C = 12, H = 1, dan O = 16) adalah ... gram
9
18
36
54
90
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Jika dalam kemasan botol parfum tertera 5% alkohol, maka volume alkohol yang terdapat dalam 250 mL parfum tersebut adalah ...
5
12.5
22.5
25
50
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Massa kafein yang terkandung dalam secangkir kopi (200 gram) dengan kadar 0,015% adalah ...
0.003
0.03
0.075
0.75
3
8.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sejumlah sampel seberat 65 gram tersebut mengandung 48 gram karbon, 9 gram hidrogen, dan 8 gram oksigen. Komposisi karbon dalam senyawa tersebut adalah ... %
72.85
73.85
75
78.5
80
9.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Molalitas larutan jika 20 gram NaOH (Mr=40) dilarutkan dalam 250 mL air adalah ... m
0.01
0.02
0.1
0.2
2
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