How many units in a 70cl ' 40 percent whiskey?

To calculate the number of units in a 70cl bottle of 40% whiskey, you can use the formula: (ABV% x volume in liters). In this case, 40% of 0.7 liters (70cl) equals 0.28 liters of pure alcohol. Since one unit of alcohol is defined as 10ml of pure alcohol, you divide 280ml by 10, resulting in 28 units in a 70cl bottle of 40% whiskey.