Is mixing food coloring with water a chemical or physical change?

Describe the conversion between potential and kinetic energy that occur when you shoot a basketball at a basket.

In some vintage science fiction movies, space travelers find themselves on a planet orbiting a distant star in which there are curious forms of life based on silicon instead of carbon.

What's the difference between chemical and nuclear energy?

What can be determined about the electron of an atom

Magnesium reacts with hydrochloric acid as shown by the equation: Mg (s) + 2HCl (aq)  MgCl2 (aq) + H2 (g). a) What volume of hydrochloric acid of concentration 2 moles/dm3 reacts exactly with 0.

A substance contains 36.1 percent calcium and 63.9 percent chlorine by weight. What is the empirical formula of the given compound? A. CaCl B. Ca0.9Cl1.8 C. CaCl2 D. Ca2Cl4

A sample of bismuth weighing 0.687 g was converted to bismuth chloride by reacting it first with HNO3, and then with HCI, followed by careful evaporation to dryness. The mass of the bismuth chloride obtained was 1.032 g.

When 1 g of sodium chloride (NaCl) is placed in 100 g of water, a solution results. Once the solution is prepared, water is now considered what part of the solution?

1. How is pressure affected as depth increases? 2. As the sun heats the surface of the oceans, two layers of water result. What separates the layers? 3. How is temperature affected when? (a) the depth increases (b) the latitude increases 4.

Are nails in a jar with water a chemical change