Try Out PSTS Ganjil Kimia Kelas XI 2024-2025

Quiz
•
Chemistry
•
11th Grade
•
Hard
Ali Sugandi
Used 1+ times
FREE Resource
15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
1. Bila massa atom relative Fe = 56, S = 32, O = 16, maka massa rumus relative Fe2(SO4)3 adalah…..
104
152
192
248
400
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
2. Jumlah partikel gas X2 sebanyak 6,02 . 1022 dan massanya 1,6 gram, maka massa molar gas X2 adalah…..
1,6 gram/mol
8 gram/mol
16 gram/mol
32 gram/mol
64 gram/mol
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
3. Berapakah jumlah mol dari 40 gram karat besi yang mempunyai rumus Fe2O3 (jika Ar Fe = 56, O = 16)…
0,02 mol
0,25 mol
2,5 mol
0,2 mol
2,0 mol
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
4. Reaksi antara kalsium sebanyak 80 gram dengan 64 gram oksigen sesuai dengan persamaan reaksi berikut :
2Ca (s) + O2 (g) ---> 2 CaO (s)
Maka massa CaO (s) yang dihasilkan sebanyak …. gram
144 gram
104 gram
96 gram
84 gram
112 gram
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
5. Asam ascorbates merupakan senyawa kimia yang disebut vitamin C, memiliki sifat antioksidan dengan rumus kimia C6H8O6.
(Ar H = 1, C = 12, O = 16). Kadar unsur karbon dalam asam askorbat adalah….
87%
73%
58%
41%
4%
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
6. Diketahui persamaan reaksi: C(s) + 2H2(g) → CH4(g)
Jika volum H2 yang direaksikan 2,24 L pada keadaan STP,
maka jumlah partikel gas CH4 yang dihasilkan adalah…( 6,02 × 1023)
3,01 × 1021 molekul
6,01 × 1021 molekul
3,01 × 1022 molekul
6,02 × 1022 molekul
6,02 × 1023 molekul
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
7. Selama aktivitas fisik, asam laktat dibentuk di jaringan otot dan menimbulkan rasa nyeri. Analisis unsur menunjukkan bahwa 40,0% C, 6,71% H dan 53,3% O. Jika diketahui bahwa berat molekul senyawa yang terbentuk 90, maka rumus molekulnya adalah…
CH2O
C3H6O3
C5H14O
CH2O2
C2H2O
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