Identify the following as an example of a physical property or a chemical property. Silver tarnishes when it comes into contact with hydrogen sulfide in the air. a) physical property

b) chemical property

A type of graph suited to show change over time

A chemist adds 50.0ML of a 0.20 mol/l sodium chloride solution to a reaction flask. Calculate the millimoles of sodium chloride the chemist has added to the flask. Round your answer to 2 significant digits.

The process of burning means to react a substance with is oxygen

The blank of a substance is the amount of that substance that can dissolve in a certain amount of a given solvent

This group of elements with a few valence electrons that conducts heat and electricity

We are all familiar with the general principles of operation of an internal combustion engine: the combustion of fuel drives out the piston.

A first order reaction has a rate constant of 0.816 at 25 oC. Given that the activation energy is 22.7 kJ/mol, calculate the rate constant at 34 oC. (enter answer to 3 decimal places)

Part b select the ester that is formed when propanoic acid reacts with isopropyl alcohol in the presence of heat and an acid catalyst.

Do metals form anions or cations

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