When 1.045 g of cao is added to 50.0 ml of water at 25.0 °c in a calorimeter, the temperature of the water increases to 32.3 °c. assuming that the specific heat of the solution is 4.18 j/(g⋅°c) and that the calorimeter itself absorbs a negligible amount of heat, calculate δh in kilojoules/mol ca(oh)2 for the reaction

Matches the chemical name of each oxide of phosphorus to its chemical formula

Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.

Using the periodic table, complete the following. element: hydrogen symbol: h₂ molecular weight: g mass of one mole: g/mol