Cho 10gam amin đơn chức X (CxHyN) phản ứng hoàn toàn với HCl (dư), thu được 15gam muối. Số đồng phân cấu tạo của X?

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal. b. he is determining chemical properties that are sufficient to identify the metal. c. he is determining physical properties that are insufficient to identify the metal. d. he is determining chemical properties that are insufficient to identify the metal.

Light waves travel than sound waves.

Nan element’s square on the periodic table, the number with the greatest numerical value represents the