Consider the reaction Ca(OH)2(s)→CaO(s)+H2O(l)Ca(OH)2(s)→ CaO(s)+H2O(l) with enthalpy of reaction ΔHrxn∘=65.2kJ/molΔHrxn∘=65.2kJ/mol What is the enthalpy of formation of CaO(s)CaO(s)?

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?

What is the percentage of hydrogen in nitrogen trihydride