What is it called when a solid turns to a gas

Which is not true for a catalyst? (A) It appears as a reactant in the net chemical reaction (B) It causes a lowering of the activation energy (C) It can be homogeneous or heterogeneous (D) It increases the rate of a chemical rate of a reaction

Which of the following statements is not a description of neptune? A. known for its strongest winds B. has no atmosphere C. one of the gas giants D. has moons

What color do neutral solutions turn the universal indicator? a. Blue c. Orange b. Red d. Green

Explain the difference between an endothermic and an exothermic reaction using the concepts of potential energy, stability, and a system. How do these types of reactions demonstrate the conservation of energy? (Energy of Reactions)

What is the molarity of a solution made by mixing 2.80 g of koh with enough water make 750 ml of solution?

During an endothermic phase change, what happens to the potential energy and the kinetic energy? Potential energy stays the same, and kinetic energy increases. Potential energy increases, and kinetic energy increases.

In the following atomic model, where does the strong nuclear force happen? А B с -0 outside A between A and B between B and C O inside C

Which groups of elements on the periodic table form metal ions that do not require roman numerals in their names?

Write the Chemical formula for the conjugate base of the following Bronsted-Lowry acids. A) H2SO4 B) HPO4^2-

The heat from the bonfire is transferred to the student's hands through the process of