Chemistry
Which of the following would weigh the most?
- 1 mole of H2O
- 1 mole of CO2
- 1 mole of NH3
- 1 mole of CO
Answer
1 mole of CO2
Reason — Since each molecule is 1 mole, the weight depends entirely on molar mass.
| Molecule | Molecular Mass |
|---|---|
| H2O | 1 x 2(H) + 16(C) = 18 g/mol |
| CO2 | 12(c) + 16 x 2(O) = 44 g/mol |
| NH3 | 14(N) + 1 x 3(H) = 17 g/mol |
| CO | 12(C) + 16(O) = 28 g/mol |
So, 1 mole of CO2 has molecular mass of 44 g/mol, hence, weigh the most.
Related Questions
Among the following compounds, identify the compound that has all three bonds (ionic, covalent and coordinate bonds).
- Ammonia
- Ammonium chloride
- Sodium hydroxide
- Calcium chloride
The gas formed when carbon reacts with concentrated sulphuric acid
- Hydrogen
- Sulphur trioxide
- Sulphur dioxide
- Oxygen
Which of these will act as a non-electrolyte?
- Liquid carbon tetrachloride
- Acetic acid
- Sodium hydroxide aqueous solution acid
- Potassium chloride aqueous solution
Assertion (A): Carbon monoxide will not produce an acid when made to react with water?
Reason (R): Carbon monoxide is a neutral oxide.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.