How many moles are represented by 170 g of glucose

Options

A. 0.4
B. 0.9
C. 6
D. 9

Explanation

To determine how many moles are represented by 170 g of glucose, we will follow these steps:

### Step 1: Identify the mass of glucose
The mass of glucose given in the problem is 170 grams.

### Step 2: Determine the molar mass of glucose
The molecular formula of glucose is C₆H₁₂O₆. To find the molar mass, we need to calculate the sum of the atomic masses of all the atoms in one molecule of glucose:
- Carbon (C): 6 atoms × 12.01 g/mol = 72.06 g/mol
- Hydrogen (H): 12 atoms × 1.008 g/mol = 12.096 g/mol
- Oxygen (O): 6 atoms × 16.00 g/mol = 96.00 g/mol

Now, add these together:
\[ \text{Molar mass of glucose} = 72.06 + 12.096 + 96.00 = 180.156 \text{ g/mol} \]
For simplicity, we can round this to 180 g/mol.

### Step 3: Use the formula to calculate moles
The formula to calculate moles is:
\[ \text{Moles} = \frac{\text{Given mass}}{\text{Molar mass}} \]

Substituting the values we have:
\[ \text{Moles} = \frac{170 \text{ g}}{180 \text{ g/mol}} \]

### Step 4: Perform the calculation
Now, calculate the number of moles:
\[ \text{Moles} = \frac{170}{180} \approx 0.9444 \text{ moles} \]

### Step 5: Round the answer
We can round 0.9444 to 0.9 for simplicity.

### Final Answer
Thus, the number of moles represented by 170 g of glucose is approximately **0.9 moles**.

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