Catalysts can save money by essentially lowering the: activation energy cost of reactants rate of reaction temperature required starting enthalpy (e1)

Suppose an object is moving through space in a straight line. What could cause the object to start moving in a circle?

The electrons in the outer shell of an atom are called: outer ionized polar valence

6. Which of the following isotopes has the same number of neutrons as phosphorus-31? a. 32P b. 32S c. 28Si d. 29Si

Explain why charcoal burning in the grill is a chemical change.

This reaction appears to be destroying the logs

What is the mass of 5000. atoms of silicon

Which coefficients balance this equation? _CH4 + _O2 - > _CO2 + _H2O A. 1, 1, 1, 1 B. 1, 1, 2, 1 C. 1, 2, 1, 2 D. 2, 1, 2, 1

Student B pushed on a cart against the wall with 500 N of force. The cart didn't move. How do u explain what happened?

What is unique about the way that transition metals form compounds? a. They don't form compounds c. They can form bonds with the electrons in the two outer-most shells b. They are the most reactive d. They can donate all of their electrons

What prompted rutherford to do the alpha particle scattering experiment?