The bond enthalpy of the H-1 bond is 295 kJ/mol. What is the AH value when the bonds in 0.5 mole of HI are broken?

How many moles of magnesium is 3.01 x10^22 atoms of magnesium?

Need ! asap will mark 10 pts using the room temperature line (orange line) and your periodic table, make lists that identify the state of matter (gas, liquid, or solid) in which each element you plotted exists at room temperature. explain your answers

Which of these are physical changes in matter? check all that apply boiling water a pencil being sharpened exploding dynamite freezing water rotting cheese