STOIKIOMETRI Pra UAS

Quiz
•
Chemistry
•
11th Grade
•
Easy
Zia Fatihah
Used 4+ times
FREE Resource
6 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
10 mins • 10 pts
Pirimidin tersusun dari 60% karbon, 5% hidrogen, dan sisanya adalah nitrogen (ArH = 1, C = 12, N = 14). Rumus empiris dari senyawa pirimidin tersebut adalah ....
C2H2N
C4H4N2
C5H5N3
C5H5N2
2.
MULTIPLE CHOICE QUESTION
10 mins • 10 pts
Jumlah atom O yang sama dengan jumlah atom O pada 100 gram CaCO3 (Mr = 100) adalah ….
1. 0,5 mol Ca(NO3)2
2. 2 mol H2SO4
3. 1 mol HNO3
4. 0,5 mol CaSO4
1,2,3 benar
1 dan 3 benar
2 dan 4 benar
4 saja benar
benar semua
3.
MULTIPLE CHOICE QUESTION
10 mins • 10 pts
Pada suhu dan tekanan tertentu, 40 mL suatu hidrokarbon bereaksi dengan 360 mL oksigen menghasilkan sejumlah gas karbondioksida dan 240 mL uap air. Senyawa hidrokarbon yang mungkin adalah ....
C2H6
C3H8
C6H12
C4H8
C5H10
4.
MULTIPLE CHOICE QUESTION
10 mins • 10 pts
Perhatikan reaksi berikut:
8NH3 + 6NO2 → 7N2 + 12H2O
Jika pada suhu dan tekanan tertentu, volume gas NH3 adalah 56 Liter, maka volume gas-gas yang dihasilkan pada reaksi tersebut adalah ....
105 L
97 L
133 L
152 L
5.
MULTIPLE CHOICE QUESTION
10 mins • 10 pts
Gas disilana (Si2H6, Mr = 62) bereaksi dengan gas O2 (Mr = 32) menurut reaksi berikut:
Si2H6 + O2 → SiO2 + H2O (reaksi belum setara). Untuk menghasilkan 90 gram SiO2 (Mr = 60), maka diperlukan disilana (Si2H6) sebanyak ...... gram
46,5
48
67,5
93
6.
MULTIPLE CHOICE QUESTION
10 mins • 10 pts
Jika 9,1 gram vanadium pentaoksida (V2O5 , Mr = 182) direaksikan dengan 12 gram kalsium (Ca, Ar = 40) menurut reaksi:
Ca + V2O5 → CaO + V (reaksi belum setara)
Jumlah vanadium (V, Ar = 51) yang akan dihasilkan adalah ...... gram
2,5
5,1
25
51
102
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