Rank the substances in order of LEAST dense (First) to MOST dense (Fifth) ? 1.soybean oil, 2.methanediol, 3.Dimethethyl,
4.water,
5.sodium chloride

Yes, endothermic means it turns cold. and some chemical changes include change of tempature.

Sorry i dont understand the question can you rephase it?

Hbr dissociates to form h+ and br-ca(oh)2 dissociates to form ca2+ and 2oh-the h+ and oh- react to form waterassuming the reactants are dissolved in water, the net reaction is h+ + oh- —> h2oif you’re asked to show all components of the reaction, the complete reaction is 2hbr + ca(oh)2 —> cabr2 + 2h2o