What 5 kinds of evidence can you use to determine if a chemical reaction has occurred?

11:06 A hot metal plate at 150°C has been placed in air at room temperature. Which event would most likely take place over the next few minutes? Molecules in both the metal and the surrounding air will start moving at lower speeds.

Aluminum reacts with sulfur gas to produce aluminum sulfide

2. 4 NH3 + 3 0₂ 2N2 + 6H₂O a. 20 moles of NHa are needed to produce - moles of 20. b. How many moles of Nz will be produced if 3.5 moles of Oz react?

Are all synthetic products bad?

What are the correct coefficients when this equation is balanced? sb + o2 - > sb4o6?

Which of the following gases in Earth's atmosphere would you expect to find as molecules and which as individual atoms? a. Nitrogen b. Oxygen c. Argon

A substance that does not conduct electricity as a solid but does conduct electricity when melted is most likely classified as (1) an ionic compound (2) a molecular compound (3) a metal (4) a nonmetal

What is done with the reactive sodium after the reaction to make sure the products are safe in an air bag?

Which of the following does not indicate a chemical change? precipitate formation crushing a solid into a powder color change gas evolution

Reactions cannot occur without a certain minimum amount of energy. what is this minimum amount of energy called?