During chemical changes, atoms unite to form a.) elements b.) groups c.) molecules d.) mixtures

atoms unite to form molecules. answer is C. Hope this helps:)

answer: at room temperature (roughly 20 degrees c), you can dissolve 203.9 grams (or 200 grams) of sugar in 100 ml of water. as water temperature increases, the amount of sugar that will dissolve increases, up to about 500 grams of sugar in 100 ml water at 100 degrees c.

explanation: