How many moles are represented by 120 g of glucose

Explanation

To determine how many moles are represented by 120 g of glucose (C₆H₁₂O₆), we can follow these steps:

### Step 1: Identify the given mass of glucose
The mass of glucose provided in the question is 120 grams.

### Step 2: Determine the molar mass of glucose
To calculate the moles, we need to know the molar mass of glucose. The molecular formula for glucose is C₆H₁₂O₆. We can calculate the molar mass as follows:

- 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 moles
The formula to calculate the number of moles (n) is:
\[ n = \frac{\text{given mass}}{\text{molar mass}} \]

Substituting the values we have:
\[ n = \frac{120 \text{ g}}{180 \text{ g/mol}} \]

### Step 4: Perform the calculation
Now, we perform the division:
\[ n = \frac{120}{180} = 0.6667 \text{ moles} \]

### Step 5: Round the answer
For simplicity, we can round this to two decimal places:
\[ n \approx 0.67 \text{ moles} \]

### Final Answer
Therefore, 120 g of glucose represents approximately **0.67 moles**.

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