To determine the number of moles of CH3CH2OH in the given solution, we can use the formula:
moles = molarity × volume (in liters)
First, we need to convert the volume from milliliters to liters. Since 1 liter is equal to 1000 milliliters, we can convert 548 ml to liters:
Volume (in liters) = 548 ml × (1 L / 1000 ml) = 0.548 L
Next, we can substitute the values into the equation:
moles = 0.0788 mol/L × 0.548 L = 0.0432 moles
Now that we have the number of moles, we can look at the answer choices provided:
- a) 6.95 x 102 mol
- b) 5.26 x 102 mol
- c) 2.32 x 102 mol
- d) 4.32 x 102 mol
- e) 1.44 x 102 mol
None of the provided options match our calculation. Therefore, it seems there may be an error in the question or options given. Based on our calculations for 548 ml of a 0.0788 M CH3CH2OH solution, the actual number of moles is approximately 0.0432 moles, not any of the choices listed. Always ensure to double-check the values and options given in questions such as these for accuracy.