Question

a student selects two identical glasses, labels them p and q, and fills each with 50 ml of boiling water. she adds 5 g of sugar to glass p and 5 g of sand to glass q. after 5 minutes, the student observes the contents in glasses p and q.
what does the student likely observe?
○ both sugar and sand dissolve in water completely.
○ both sugar and sand collect at the bottom of the glasses.
○ sugar dissolves completely in glass p, and sand settles at the bottom of glass q.
○ sugar settles at the bottom of glass p, and sand dissolves completely in glass q.

Explanation:

Sugar is a water-soluble substance, so it will fully dissolve in the boiling water of glass P. Sand is insoluble in water, so it will not dissolve and will settle at the bottom of glass Q over time.

Answer:

Sugar dissolves completely in glass P, and sand settles at the bottom of glass Q.