What is the exact number of moles of isopropanol in the container?
The correct answer and explanation is:
To calculate the exact number of moles of isopropanol in a container, you need to know the amount of isopropanol (in grams) and its molar mass.
Here is the step-by-step process:
1. Determine the mass of isopropanol
You must first know how much isopropanol is in the container, typically given in grams. Let’s assume the mass of isopropanol in the container is provided.
2. Calculate the molar mass of isopropanol (C3H8O)
Isopropanol has the following chemical formula: C3H8O. To find its molar mass, you need to sum the atomic masses of all the atoms in one molecule of isopropanol:
- Carbon (C): 12.01 g/mol (3 atoms) = 12.01 × 3 = 36.03 g/mol
- Hydrogen (H): 1.008 g/mol (8 atoms) = 1.008 × 8 = 8.064 g/mol
- Oxygen (O): 16.00 g/mol (1 atom) = 16.00 g/mol
Now, sum these values to get the molar mass of isopropanol: Molar Mass of Isopropanol=36.03+8.064+16.00=60.094 g/mol\text{Molar Mass of Isopropanol} = 36.03 + 8.064 + 16.00 = 60.094 \, \text{g/mol}
3. Use the formula to calculate moles
To find the number of moles, use the following formula: Moles=Mass (g)Molar Mass (g/mol)\text{Moles} = \frac{\text{Mass (g)}}{\text{Molar Mass (g/mol)}}
If you know the mass of isopropanol, just divide that number by 60.094 g/mol. For example, if there are 120 grams of isopropanol in the container, the calculation would be: Moles=12060.094≈1.998 moles\text{Moles} = \frac{120}{60.094} \approx 1.998 \, \text{moles}
Thus, there would be approximately 2 moles of isopropanol in the container.
Conclusion
To determine the exact number of moles of isopropanol in the container, you need the mass of the isopropanol and the molar mass (which is 60.094 g/mol). Divide the mass of the isopropanol by its molar mass to get the number of moles. This is a straightforward calculation and can be done easily with the right data.