Students of different ages were given the same jigsaw puzzle to put together. They were timed to see how long it took to finish the puzzle. Which on is the Independent variable, dependent variable, and controlling variables?

Which number represents a basic pH, 4 or 9

Consider the following reaction at 298K. Zn2 + (aq) + Co (s) Zn (s) + Co2 + (aq) Which of the following statements are correct? Choose all that apply. K > 1 delta Go < 0 Eocell < 0 The reaction is reactant-favored. n = 4 mol electrons

How is the structure around a given atom related to repulsion between valence electron pairs on the atom involved

What are two factors that determine whether two colliding particles will interact chemically?

Why does sulfur have more than 8 electrons in its valence?

Which of the following statements best describes the basic structure of an atom? Electrons and protons are in motion around a nucleus that contains neutrons Neutrons are in motion around a nucleus that contains protons and electrons Protons are in

Which of the following elements is released into the atmosphere by all of these processes: volcanic outgassing, animal respiration and flatulence, burning of fossil fuels, and metamorphism of limestone? a. Carbon. b. Nitrogen. c. Oxygen. d. Sulfur

A phase change from a solid to a gas is called what

What is the meaning of semipermeability?

What type of reaction does Fe+Ag2SO4-FeSO4+Ag