Iron is extracted from iron ore in a blast furnace. Which solid substances are fed into the top of the blast furnace?
1
coke
2
cryolite
3
limestone

Which type of reaction always has an element and a compound as reactants

An exothermic reaction is conducted in an insulated calorimeter filled with water. the calorimeter is then sealed so that there is no heat exchanged between the contents of the container and the surrounding air. which of the following statements is true about the reaction?

Check the correct box to describe the periodic trends in electronegativity. electronegativity across a period: decreases. increases. electronegativity down a group: decreases. increases.