Are each of the equations Ca+CL2=CaCL2 and Zn+Ag2s=ZnS+Ag balanced? Why or Why not?

You get a cooling effect when acetone is placed on your nails. Why is placing acetone on your nails an endothermic process?

Titanium will react with magnesium oxide but sodium reacts with titanium oxide. The position of titanium will be a. above sodium b ... below magnesium but above iron c. below sodium but above magnesium d ... below silver

Jerome is conducting a series of experiments. His first hypothesis was: "All buttons are magnetic." During the experiment, he observed that a magnet attracted metallic buttons, but had no effect on plastic or wooden buttons.

A volume of 80.0 mL of aqueous potassium hydroxide (KOH) is titrated against a standard solution of sulfuric acid (H2SO4). What was the molarity of the KOH solution if 12.7 mL of 1.50 M H2SO4 was needed

Calculate the amount of energy required to melt 500 g of ice at 0oc. (δhfus=5.96 kj/mole; δhfus is the energy required to melt ice at a constant 0oc; note the units!)

A student makes observations when water is added to a blue solution of copper sulfate. The student makes only 1 observation: the solution changes to a lighter shade of blue. Is this an example of a chemical reaction? Explain your reasoning.

When dos the spring tide occur

As ice transforms into steam, Question options: new molecules are formed. the types of atoms are changed. energy is absorbed by the molecules. the mass of the molecules is increased.

Why do chemists consider the periodic table so useful?

Plates include large sections of Earth Oceanic or Continental