Ina memiliki 54 gram air. Berapa molair (H₂O) dalam air tersebut?
STS Kimia Kelas 11 s1 Kelas 11--6

Quiz
•
Chemistry
•
11th Grade
•
Hard
Ahmad Abubakar
Used 3+ times
FREE Resource
24 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1,5 mol
3,0 mol
2,0 mol
3,6 mol
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Rudi sedang melakukan eksperimen dengan soda kue dan cuka (asam asetat). Berapa perbandingan molar natrium bikarbonat dan asam asetat yang harus ia gunakan?
1:1
2:1
1:2
3:1
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Adi sedang melakukan percobaan di laboratorium. Berapakah jumlah oksigen (O₂) yang diperlukan untuk membakar sempurna 16 gram metana (CH₄) yang ia gunakan dalam eksperimennya?
32 gram
64 gram
48 gram
80 gram
Answer explanation
Reaksi pembakaran metana (CH₄) adalah CH₄ + 2O₂ → CO₂ + 2H₂O. Untuk 16 gram CH₄ (1 mol = 16 gram), dibutuhkan 2 mol O₂. Jadi, 2 mol O₂ = 2 x 32 gram = 64 gram. Maka, jumlah oksigen yang diperlukan adalah 64 gram.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hadi sedang membuat larutan dengan melarutkan 20 gram NaCl dalam 500 mL air. Berapa konsentrasi larutan yang dihasilkan?
0,4M
0,68M
0,85M
1,2M
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pada reaksi netralisasi HCl dan NaOH, berapa mol HCl yang diperlukan untuk menetralkan 0,5 mol NaOH?
0,25 mol
0,5 mol
1,0 mol
2,0 mol
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Eko sedang melakukan eksperimen di laboratorium. Berapakah massa karbon dioksida (CO₂) yang dihasilkan ketika 10 gram glukosa (C₆H₁₂O₆) mengalami pembakaran sempurna?
14,67 gram
22,00 gram
29,33 gram
44,00 gram
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Berapa jumlah atom hidrogen dalam 5 mol asam sulfat (H₂SO₄)?
3,01×1024 atom
6,02×1024 atom
1,20×1025 atom
2,41×1025 atom
Answer explanation
Asam sulfat (H₂SO₄) mengandung 2 atom hidrogen per molekul. Dalam 5 mol, jumlah atom hidrogen adalah 5 mol x 2 atom/mol x 6,02×10²³ atom/mol = 6,02×10²⁴ atom. Jadi, jawaban yang benar adalah 6,02×10²⁴ atom.
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