the kilocalories in one tablespoon of vegetable oil, which contains 21 g of fat and no carbohydrate or protein
Express your answer to two significant figures and include the appropriate units.
One gram of fat contains 9 kilocalories. Therefore, 21 g of fat would contain 21 * 9 = <<21*9=189>>189 kilocalories.
Therefore, one tablespoon of vegetable oil, which contains 21 g of fat, would have 189 kilocalories.
Expressed to two significant figures, the answer is 190 kilocalories.
To calculate the kilocalories in one tablespoon of vegetable oil, we need to know the energy content of fat. Each gram of fat contains about 9 kilocalories.
Given that one tablespoon of vegetable oil contains 21 grams of fat, we can calculate the kilocalories as follows:
Kilocalories = grams of fat x kilocalories per gram of fat
Kilocalories = 21 g x 9 kcal/g
Kilocalories = 189 kcal
Therefore, there are approximately 189 kilocalories in one tablespoon of vegetable oil.