Mole Concept
Determine empirical formula of a compound with 52.17% C, 34.78% O and 13.04% H (Atomic masses: C=12, O=16, H=1).
Select the correct option:
Solution
C2H6O
- Moles in 100g:
- C:52.17/12=4.348 mol.
- H:13.04/1=13.04 mol.
- O:34.78/16=2.174 mol.
- Simplest Ratio (divide by smallest, 2.174):
- C:4.348/2.174=2.
- H:13.04/2.174=6.
- O:2.174/2.174=1.
- Result: Empirical formula is C2H6O.
🔒 Solution Hidden from View
Submit your answer to unlock the detailed step-by-step solution.
More mole concept Practice Questions
A sample of an oxide of iron contains 7.0 g of iron and 3.0 g of oxygen. If the atomic masses of Fe ...
A sample of an oxide of iron contains 7.0 g of iron and 3.0 g of oxygen. If the atomic masses of Fe ...
When 9.0 g of aluminium reacts completely with oxygen, how many grams of Al2O3 are formed? (2Al + 3/...
When 9.0 g of aluminium reacts completely with oxygen, how many grams of Al2O3 are formed? (2Al + 3/...
How many moles of oxygen atoms are present in 5.0 g of CaCO3? (Atomic masses: Ca=40, C=12, O=16)
How many moles of oxygen atoms are present in 5.0 g of CaCO3? (Atomic masses: Ca=40, C=12, O=16)
The density of a gas at STP is 1.25 g L⁻¹. Its molar mass is approximately:
The density of a gas at STP is 1.25 g L⁻¹. Its molar mass is approximately:
Which statement correctly defines molality?
Which statement correctly defines molality?
0.50 mol of CaCO3 is heated strongly. How many liters of CO2 (at STP) are evolved? (CaCO3 → CaO + CO...
0.50 mol of CaCO3 is heated strongly. How many liters of CO2 (at STP) are evolved? (CaCO3 → CaO + CO...
About This Question
- Subject
- chemistry
- Chapter
- some basic concepts in chemistry
- Topic
- mole concept
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
C2H6O
- Moles in 100g:
- C:52.17/12=4.348 mol.
- H:13.04/1=13.04 mol.
- O:34.78/16=2.174 mol.
- Simplest Ratio (divide by smallest, 2.174):
- C:4.348/2.174=2.
- H:13.04/2.174=6.
- O:2.174/2.174=1.
- Result: Empirical formula is C2H6O.
This medium difficulty chemistry question is from the chapter some basic concepts in chemistry, covering the topic of mole concept. It appeared in the 2025 exam.
Looking for more practice? Explore all chemistry questions or browse some basic concepts in chemistry questions on RankGuru.