(a) The half-life of the first-order decay of radioactive 14C is about 5720 years. Calculate the rate constant for the reaction. (b) The natural abundance of 14C isotope is 1.1 x 10-13 mol % of living matter. Radiochemical analysis of an object obtained in an archeological excavation shows that the 14C content is 0.89 x 10-14 mol %. Calculate the age of the object and state any assumptions you make.

1.aluminum chloride (alcl3), and sodium hydroxide (naoh) can react to form aluminum hydroxide (al(oh)3) and sodium chloride (nacl).    you have 13.4 g of aluminum chloride and 10.0 g of sodium hydroxide. answer the following questions: •what is the balanced equation for this reaction? •if you use all 13.4 g of aluminum chloride, how many grams of aluminum hydroxide can be formed? work must be shown to earn credit •if you use all 10.0 g of sodium hydroxide, how many grams of aluminum hydroxide can be formed? work must be shown to earn credit •how many grams of aluminum hydroxide will actually be made?     which reagent is limiting? explain your answer.

Which statement describes covalent bases? they have hydroxide ions. they produce hydrogen ions. they are often amines. they are named the same as ionic compounds.

Explanation for basic character?