Which is an example of an energy transformation?

(A) a soccer ball sitting in a field.

(B)

a person waiting at a crosswalk.

(C)

an unlit candle.

(D)

a boulder falling off a tall cliff.

An ionic compound is formed when there is a reaction between the elements a) strontium and chlorine b) hydrogen and chlorine c) nitrogen and oxygen d) sulfur and oxygen

Which planet in our solar system is closest to the sun? A) Jupiter B) Earth C) Mercury D) Saturn

Do ionic bonds dissolve in methanol

Explain how the change in free energy determines the direction of a chemical reaction and how chemical reactions eventually reach a state of equilibrium.

Exit Which of the following is best revealed by the Bohr Model? A. Electrons are found only within the nucleus of an atom. B. Protons orbit the nucleus of an atom in fixed proton shells. C.

A conical, flat-bottomed flask with a narrow neck that can be used for heating, mixing, watching reactions, and swirling, not for measuring

Answer 1. the law of conservation of mass states that mass is neither created nor destroyed in an ordinary chemical reaction. when an iron nail rusts, it seems to get heavier in mass. does the iron nail follow the law of conservation of mass?

Ammonia (NH3) burns in air to form nitrogen dioxide and water. Calculate grams of nitrogen dioxide produced if 4.0 grams of ammonia are consumed

What year did mendeleev organized his periodic table in order of increasing atomic number

What is the volume of 1.9 moles of chlorine gas (Cl2) at standard temperature and pressure (STP) ? 12 L 22.4 L 43 L 81 L