PRIVATE IPA SMP - Sesi 11.3

Quiz
•
Science
•
6th - 8th Grade
•
Easy
Lifya Muthia
Used 1+ times
FREE Resource
15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Satu sampel suatu zat mengandung 2,4 gram karbon, 3,2 gram oksigen, 5,6 gram nitrogen, dan 0,8 gram hidrogen. Persen massa karbon dalam zat tersebut adalah...
20%
23,3%
44,8%
48%
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Berapakah kadar unsur natrium yang terkandung di dalam natrium sulfat (Na2SO4)? (Diketahui Ar Na=23, Ar S=32, dan Ar O=16)
22,6 %
32,4 %
45%
50%
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Berapakah kadar unsur dan massa klorin (Cl) yang terdapat pada 500 gram senyawa kaporit jika diketahui Ar klorin adalah 35,5 dan Mr kaporit adalah 143?
248 gr
264 gr
272 gr
344 gr
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Unsur nitrogen dan oksigen bereaksi, dan dapat membentuk lebih dari satu macam senyawa, seperti : NO, NO2, N2O, N2O3, dan N2O5. Tentukan besarnya persentase unsur oksigen dalam senyawa N2O3 (Ar N = 14 dan O = 16)!
36,84%
63,16%
23,73%
76,27%
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Berapakah massa kalsium (Ca) yang terdapat dalam 250 kg CaCO3 (Ar Ca = 40, C = 12, dan O = 16)?
90 kg
100 kg
110 kg
120 kg
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Berapakah massa asam fosfat (H3PO4) yang dibuat dari 6,2 gram fosfor (Ar H = 1, P = 31, dan O = 16)?
14,6 gr
16,4 gr
41,6 gr
64,1 gr
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Berapakah massa natrium klorida (NaCl) yang mengandung 196,58 gram natrium (Ar Na = 23 dan Cl = 35,5)?
400 gr
450 gr
500 gr
550 gr
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