How many molecules of ammonia are required to form 8 molecules of urea

Options

A. 24
B. 8
C. 16
D. 4

Answer

To determine how many molecules of ammonia are required to form 8 molecules of urea, we can follow these steps:

### Step 1: Understand the relationship between ammonia and urea
In the urea cycle, the conversion of ammonia to urea follows a specific stoichiometric ratio. It is known that 2 molecules of ammonia are required to produce 1 molecule of urea.

### Step 2: Set up the ratio
From the information above, we can establish the following ratio:
- 2 molecules of ammonia → 1 molecule of urea

### Step 3: Calculate the amount of ammonia needed for 8 molecules of urea
Since we need to find out how many molecules of ammonia are required to produce 8 molecules of urea, we can set up a proportion based on the established ratio:
- If 1 urea requires 2 ammonia, then 8 urea will require:

\[ \text{Ammonia required} = 8 \text{ urea} \times 2 \text{ ammonia/urea} \]

### Step 4: Perform the calculation
Now, we calculate:
- \( 8 \times 2 = 16 \)

### Step 5: Conclusion
Therefore, to form 8 molecules of urea, 16 molecules of ammonia are required.

### Final Answer:
16 molecules of ammonia are required to form 8 molecules of urea.

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