Which of the following changes when a catalyst is used

Enthalpy of reaction

activation energy

both enthalpy of reaction and activation energy change

neither enthalpy of reaction nor activation change

What is the electron structure of a beryllium ion with a net ionic charge of + 2?

Cuales son las leyes de newton

What is the molar mass of oxygen, O2? (Round to four significant figures only.) 32.00 g 16.00 g 15.99 g

For an object that has positive constant acceleration what does the speed vs time graph look like

What reading strategy would you use before you read a book or article? A. Monitoring and applying fix-up strategies B. Using text features and visual cues C. Activating prior knowledge D. Summarizing

Calculate the formula mass of ethanol, c2h5oh. express your answer to three significant figures and include the appropriate units.

What are the four classifications of matter? of those four, which two are pure substances?

Which relationship or statement best describes delta s for the following reaction: 2H2S (g) + 3O2 (g) - -> 2H2O (g) a) Delta S = 0 b) Delta S < 0 c) Delta S> 0 d) Delta S = Delta H |T e) More information is needed to make a reasonable prediction.

Which of the following subatomic particles are found outside of the nucleus?

How many atoms does a molecule of sodium chloride contain?