A block of iron is heated from 22oC to 78oC. The mass of the block is 150 g. How much thermal energy must be added to the block of iron?

Y=‐1x + 7 if y has a value of ‐24 what is the value of x?

An atom of lithium (li) and an atom of chlorine (cl) engage in a chemical reaction. which correctly describes the structure of the resulting chemical compound? hint: consider the class of each element. the chemical compound will have a network structure. the chemical compound will have triple bonds. the chemical compound will have a ball-and-stick structure. the chemical compound will have double bonds.

How many molecules are in 6.0 moles of methane