A 43.6-mg sample of boron reacts with oxygen to form 140 mg of the compound boron oxide. What is the empirical formula of boron oxide? Help Please! First Answer gets Brainliest!

From the options provided for each element below, choose the properties that it may have based on its location in the periodic table fluorine (f): highly reactive nonmetal shiny a conductor

To find the enthalpy of a reaction in the lab, you measured the of the reactants and the change during the reaction.

Asample of sea water contains 6.28g of sodium chloride per litre of solution. how many milligrams of sodium chloride would be contained in 15.0ml of this solution?