Choose the correct option which is monoatomic divalent ions
1] OH-
2] Ca2-
3]Na+
4]Cl-

Ionic compounds are made of ions, and yet the overall charge of an ionic compound is neutral. why?

Will mark brainliest 26. which of these statements are true? (3 points) a. gases are compressible b. gases fill their containers completely c. the pressure of a gas is independent of the temperature d. gases have mass e. gases exert pressure f. the pressure of a gas is dependent on the volume g. gas pressure results from the collisions between gas particles h. gases have a definite volume and shape

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