4. A blue crystal is placed in water. After much stirring, the crystal disappears and the water
becomes blue. The liquid is then heated.
Eventually, all the water evaporates and
many small blue crystals appear. Has a
chemical reaction taken place? Explain.

During trial 2, what allowed you to determine that aluminum was the limiting reactant? check all that apply. all of the copper dissolved. all of the aluminum dissolved. the solution turned clear. the number of grams of copper(ii) chloride used in the reaction was greater than the number of grams of aluminum. the molar ratio of copper(ii) chloride to aluminum was greater than 3: 2, the equation’s molar ratio.

1) this is the structure in the cell nucleus that houses a cell's genetic information

In the 1800s, one of the statements in john dalton's atomic theory was that atoms are indivisible. later experimental evidence led to the discovery of subatomic particles such as neutrons, electrons, and protons. what happened to the indivisible atom part of dalton's atomic theory, and why?