Khi hoá hợp 2,1 gam sắt với lưu huỳnh, ngoài tạo ra FeS còn toả ra 1 lượng nhiệt bằng 3,77 kJ. Hiệu suất phản ứng là 100%. Tính nhiệt tạo thành của FeS

Which statement correctly describes metallic bonds? a. they form when certain atoms lose electrons and other atoms gain electrons. b. they involve an attraction between anions and cations. they always involvpoth a metal and a nonmetal. d. they can only form between atoms of the same element. e. they form because electrons can move freely between atoms.

In the reaction between a crushed antacid tablet and vinegar what gas is emitted

In order to complete this lab. you will need to be familiar with some common chemistry terms. complete the chemical change puzzle and list the relevant terms and their meaning below a. rectant b. product c. supernate