A 0.821 gram sample of pure NH F was treated with 25.0 mL of 1.00 M NaOH

and heated to drive off the NH3. How many milliliters of 0.500 M HCl are needed for the back titration?

Find the rms speed of the molecules of a sample of n2 (diatomic nitrogen) gas at a temperature of 34.3°c.

Which of the following is not true in regard to noble gases? A. These elements tend to be relatively inactive B. These elements tend to gain or lose electrons easily C. These elements are found in the last column (Group 18) on the periodic table D.

How can you tell how old your dog is

Which pair of elements form an ionic bond with each other? 1) KCI 2) ICI 3) PCI 4) HCI

Which statement is correct about the reaction that occurs between sodium hydroxide and hydrochloric acid? It is a single replacement reaction because two new compounds of sodium and chlorine are formed.

Which of the following is a chemical property? A.) Ability to burn B.) Mass C.) Density D.) All of the above

What is the density of rock if it has a mass of 25 g?

In a popular classroom demonstration, solid sodium is added to liquid water and reacts to produce hydrogen gas and aqueous sodium hydroxide. part a write a balanced chemical equation for this reaction.

Calculate the vapor pressure lowering on an aqueous solution of glycerin that contains 180g of glycerin and 1000g of water at 25c. The vapor pressure of water at this temperature is 23.8torr.

Why does one Oxygen atom bond with two Hydrogen atoms to form water? Why don't they bond in a different ratio?