Rachel is given 50 grams each of three different white powders that look very similar. She is told that each of these powders is commonly used in cooking. Without tasting any of them, she is asked to try to identify them. She is told the amounts of sugar and salt that can each be dissolved in 100 mL of water. Rachel adds all 50 grams of one powder to 100 mL of water. Afterwards, she has a clear liquid with no trace of the powder in it. Which of the following could this powder have been?