What is the definition of half-life?

What type of rock would you expect to form as the result of an explosive eruption?

Explain what it means by a balanced chemical equation

Label each of the following as either a physical process or a chemical process. a. corrosion of aluminum metal. b. Melting of ice. c. Pulverizing an aspirin. d. Digesting a candy bar. e. Explosion of nitroglycerin. f. Milk turning sour. g.

Which of these describes convection? a. heat transfer from one molecule to another b. heat transfer through electromagnetic waves c. heat transfer through light shining on an object d. heat transfer through moving currents

Which best describes the transfer of heat energy through radiation? A. Heat energy is transferred from molecule to molecule by collision. B. Cool, high pressure air pushes warm, low pressure air out of the way. C.

You are asked to prepare 500 mL 0.250 M acetate buffer at pH 5.00 using only pure acetic acid (MW=60.05 g/mol, pKa=4.76), 3.00 M NaOH, and water. Answer the questions regarding the preparation of the buffer. 1.

Which direction do electrons move in when metals react with non-metals?

Hen an electric current passes through liquid water, hydrogen gas passes accumulates at one electrode and oxygen accumulates at the other. Which of the following is true? A) A physical change has occurred, with energy is being absorbed.

Explain what happens to water when heat energy is absorbed a. Ice melts b. Liquid water freezes c. Water vapor condenses

Will fluorine form an anion or a cation? Why?