18 gms of glucose contains_ moles of glucose

Answer

To find the number of moles of glucose in 18 grams, we can follow these steps:

### Step 1: Write the molecular formula of glucose
The molecular formula of glucose is C₆H₁₂O₆.

### Step 2: Calculate the molar mass of glucose
To calculate the molar mass, we need to sum the atomic masses of all the atoms in the molecular formula:
- Carbon (C): 6 atoms × 12 g/mol = 72 g/mol
- Hydrogen (H): 12 atoms × 1 g/mol = 12 g/mol
- Oxygen (O): 6 atoms × 16 g/mol = 96 g/mol

Now, add these values together:
\[ \text{Molar mass of glucose} = 72 + 12 + 96 = 180 \text{ g/mol} \]

### Step 3: Use the formula to calculate the number of moles
The number of moles (n) can be calculated using the formula:
\[ n = \frac{\text{mass (g)}}{\text{molar mass (g/mol)}} \]
In this case, we have:
\[ n = \frac{18 \text{ g}}{180 \text{ g/mol}} \]

### Step 4: Perform the calculation
Now, we can perform the calculation:
\[ n = \frac{18}{180} = 0.1 \text{ moles} \]

### Final Answer
Therefore, 18 grams of glucose contains **0.1 moles** of glucose.

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