Which of the following is a characteristic property of ionic compounds? A. They have low melting points. B. They form hard, brittle crystals. C. They do not form crystals. D. They have low boiling points.

Compare and contrast physical changes with chemical changes.

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

The diagram below shows a cell placed in a solution.a cell is shown placed inside a beaker. it is labeled cell. the solution inside the beaker is labeled 40% salt solution and the solution inside the cell is labeled 20% salt solution.only water is allowed to move in and out of the cell. what will most likely happen to the cell? it will expand as water moves out of it. it will shrink as water moves out of it.it will expand as water moves into it. it will shrink as water moves into it.