Which statement best describes the difference between a physical change and a chemical change

What is the charge associated with each side of the HCl molecule?

If a car can go 80 miles per hour. how long does it take for the car to reach 80 miles?

A 14.0 gram sample of iron is initially at 414.0 °C. It loses 186.0 J of heat to its surroundings. What is its final temperature?

According to the Arrhenius theory of acids, citric acid in oranges and acetic acids in vinegar are classified as acids because their aqueous solutions contain?

Classify each of the following as a pure substance or a mixture; if it is a mixture, state whether it is heterogeneous o bomogeneous: (a) concrete, (btomato juice. (c) marble, (d) seawater, and (e) iron.

If you were to remove an electron from a sodium atom that has eleven protons, what would be the electrical charge of the ion?

The atomic mass of fluorine in 19.0 amu, so the molar mass is?

A rod shaped organism with no nucleus commonly found in Garbage will most likely belong to which kingdom

Alka-Seltzer is a solid mixture of two substances, sodium bicarbonate (NaHCO3) and citric acid (H3C6H5O7). The substances react to form water, carbon dioxide (CO2), and Na3C6H5O7.

Four properties of water are listed. 1. It is colorless and odorless in its pure form. 2. It reacts with metals to form metal hydroxide and hydrogen gas. 3. When heated to 100 °C, water evaporates. 4. It decomposes to form hydrogen and oxygen.