How much energy is required to melt a 500. gram block of iron? the heat of vaporization is 6090 j/g and the heat of fusion is 247 j/g.

How many moles are in 123.0 grams of kclo4?

The solid xy decomposes into gaseous x and y: xy(s) m x(g) + y(g) kp = 4.1 (at 0 °c) if the reaction is carried out in a 22.4 l container, which initial amounts of x and y will result in the formation of solid xy?

How are isotopes of the same element alike?