Rank these following molecules from smallest to largest: Glucose, Starch, and Iodine Potassium Iodide Molecules
1. Glucose
2. Iodine Potassium Iodide
3. Starch
To rank these molecules from smallest to largest, we need to compare their molecular structures or molar masses. Let's break it down:
1. Glucose (C6H12O6):
Glucose is a monosaccharide, which means it consists of a single sugar unit. It has a molecular formula of C6H12O6. To compare its size with the other molecules, we need to consider the number of atoms in each molecule.
2. Iodine Potassium Iodide (KI3):
Iodine Potassium Iodide is an ionic compound formed between iodine (I) and potassium (K). Its molecular formula is KI3, indicating that it contains one potassium atom (K) and three iodine atoms (I). However, it's important to note that when we talk about the size of molecules, we usually refer to the size of the individual particles that make up the compound.
3. Starch:
Starch is a complex carbohydrate made up of many glucose units linked together. It is a polymer, meaning it consists of repeating units called monomers. The molecular structure of starch consists of many glucose molecules joined together.
Now, to rank these molecules from smallest to largest:
1. Glucose (C6H12O6):
As it is a monosaccharide with a simple structure, glucose is the smallest molecule among the given options.
2. Iodine Potassium Iodide (KI3):
Although KI3 has more atoms than glucose, we typically refer to the individual particles when comparing molecule size. Since KI3's structure contains just one potassium atom and three iodine atoms, it is larger than glucose.
3. Starch:
Starch is a polymer composed of many glucose units linked together. Since it consists of multiple glucose molecules, it is the largest molecule among the options given.
Therefore, the ranking from smallest to largest is: Glucose < Iodine Potassium Iodide < Starch.
To rank these molecules from smallest to largest, we need to consider their molecular weights.
1. Iodine Potassium Iodide Molecules: The molecular weight of iodine (I2) is approximately 253.8 g/mol, and the molecular weight of potassium iodide (KI) is approximately 166 g/mol. Therefore, the combined molecular weight of iodine potassium iodide molecules would be higher than either individual compound.
2. Glucose: The molecular weight of glucose (C6H12O6) is approximately 180 g/mol. Glucose is a relatively small molecule compared to starch.
3. Starch: Starch is a complex carbohydrate made up of multiple glucose molecules. It has a much higher molecular weight than glucose due to its branched structure. The molecular weight of starch can range from several thousand to over one million grams per mole, depending on the type and degree of branching.
Based on molecular weight, we can rank the molecules from smallest to largest as follows:
Glucose < Iodine Potassium Iodide Molecules < Starch