Đốt cháy một lượng amin đơn chức A bằng O2 vừa đủ. Sản phẩm cháy cho qua bình nước vôi trong dư thâý có 1,12 lít khí (đktc) thoát ra khỏi bình, trong bình xuất hiện 10 gam kết tủa. A có công thức phân tử là?

11. phosphorus-32 is radioactive and has a half life of 14 days. how much of a 124 mg sample of phosphorus-32 is present after 56 days? a) 7.75 mg b) 15.5 mg c) 31.0 mg d) 62.0 mg

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

What is the chemical name of the compound na2co3? use the list of polyatomic ions and the periodic table to you answer. a. sodium carbon oxide b. sodium carbonate c. sodium(ll) carbonate d. sodium oxalate