Which will decrease the rate of a reaction? changing the temperature from 90ºC to 40ºC adjusting the concentration from 30 ng to 60 ng placing the substance in a smaller container grinding the substance into a powder

Atoms that have a full outer level combine with other atoms. Is this true or false

Which of the following is the Arrhenius definition of an acid? a. a substance that donates a hydrogen ion to another substance during a reaction b. a substance that increases the concentration of hydronium ions when dissolved in water c.

The density of a mineral is 2.6g/cm * what is the specific gravity

Describe the reproductive cycle of bread mold

Show the algebraic symbol for voltage, aka electromotive force, or EMF Which letter is it? R I E P t

A stock solution containing Mn2 ions was prepared by dissolving 1.584g of pure manganese metal in nitric acid and diluting to a final volume of 1.000L. The following solutions were then prepared by dilution:a. For solution A, 50.

When can a hypothesis be elevated to the status of a theory?

What is the net electrical charge on a magnesium ion that is formed when a neutral atom loses two electrons?

Solid magnesium carbonate (mgco3) and solid sodium nitrate were mixed, placed in water, and stirred. what is observed? 1. mgco3 and nano3 will not dissolve. 2. mgco3 and nano3 will dissolve. 3. mgco3 will remain undissolved and nano3 will dissolve.

A method of lowering the concentration of HCl (aq) is to allow the solution to react with a small quantity of Mg. How many milligrams of Mg must be added to 219 mL of 1.032 M HCl to reduce the solution concentration to exactly 1.000 MHCl