Which of the following does not contain 32 g of oxygen ?

Options

A. 2 mol of `H_(2)O`
B. 60 g of `C_(6)H_(12)O_(6)`
C. `N_(A)` molecules of `CO_(2)`
D. 60 g of urea, `NH_(2)-underset(O)underset(||)(C )-NH_(2)`

Explanation

To solve the question "Which of the following does not contain 32 g of oxygen?", we will analyze each option one by one to determine the amount of oxygen present in each compound.

### Step-by-Step Solution:

1. **Understanding the Question**: We need to identify which of the given options does not contain 32 grams of oxygen.

2. **Option 1: 2 moles of H2O**
- **Calculation**:
- 1 mole of H2O contains 16 grams of oxygen.
- Therefore, 2 moles of H2O will contain:
\[ 2 \text{ moles} \times 16 \text{ g/mole} = 32 \text{ grams of oxygen} \]
- **Conclusion**: This option contains 32 grams of oxygen.

3. **Option 2: 60 grams of C6H12O6 (Glucose)**
- **Molar Mass Calculation**:
- The molar mass of C6H12O6 is calculated as follows:
- Carbon (C): 12 g/mol × 6 = 72 g
- Hydrogen (H): 1 g/mol × 12 = 12 g
- Oxygen (O): 16 g/mol × 6 = 96 g
- Total molar mass = 72 + 12 + 96 = 180 g/mol
- **Oxygen Content Calculation**:
- The fraction of oxygen in glucose is:
\[ \frac{96 \text{ g (Oxygen)}}{180 \text{ g (Total)}} = \frac{32}{60} \]
- Therefore, in 60 grams of C6H12O6, the amount of oxygen is:
\[ 60 \text{ g} \times \frac{96}{180} = 32 \text{ grams of oxygen} \]
- **Conclusion**: This option also contains 32 grams of oxygen.

4. **Option 3: 1 mole of CO2**
- **Calculation**:
- 1 mole of CO2 contains 2 moles of oxygen.
- Since 1 mole of oxygen weighs 16 grams, 2 moles will weigh:
\[ 2 \text{ moles} \times 16 \text{ g/mole} = 32 \text{ grams of oxygen} \]
- **Conclusion**: This option contains 32 grams of oxygen as well.

5. **Option 4: An unspecified amount of a substance**
- Since we have not analyzed this option yet, we need to clarify what substance it refers to. However, if it does not specify a known compound or quantity, we can conclude that it may not contain 32 grams of oxygen.

### Final Conclusion:
Based on the analysis, all the options provided (2 moles of H2O, 60 grams of C6H12O6, and 1 mole of CO2) contain 32 grams of oxygen. Therefore, the option that does not specify a known quantity or is ambiguous is the one that does not contain 32 grams of oxygen.