Gas syringe

bung

chips

25 cm of dilute

hydrochloric acid

Which channes slow down the rate of reaction?

Decrease the size of pieces of marble chips

Decrease surface area of marble chips

Inercase concentration of acid

Increase temperature of acid

Explain how you figure out the number of neutrons in Tellurium-128.

You break a pencil lead. Which statement is true? A physical change has occurred, with no energy change. A physical change has occurred, with energy being given off. A chemical change has occurred, with energy being absorbed.

Playing (as opposed to working) in the laboratory or bothering another person is a). all right (if your working) b). Not dangerous c). Always against the rules d). all right

What is steam distillation and why is it a preferred technique to purify high boiling liquids that are water-insoluble?

Perform the following conversion 0.6280 mol As to g As

What is the PH of a solution whose [H+] is 0.0007

What was concluded about the structure of the atom as the result of the gold foil experiment? (1) A positively charged nucleus is surrounded by positively charged particles. (2) A positively charged nucleus is surrounded by mostly empty space.

Andre is predicting the products of chemical reactions. In one reaction, a hydrocarbon is the only reactant. What is the best prediction and explanation of this reaction? Two new compounds form as the hydrocarbon undergoes a synthesis reaction.

What evidence is there that electrons move around in definite pathways around the nucleus? What evidence is there that electrons m

Are greenhouse gases good for us?