Question 2  which of the following is an endothermic reaction? question 2 options: dissolving sugar in water iron rusting campfire burning ice melting

The answers are dissolving sugar in water and ice melting. An endothermic process absorbs heat like dissolving sugar in water since the reaction requires energy. Likewise, ice melting is an endothermic reaction since ice molecules are absorbing the thermal energy of the surrounding, moving faster and farther away from each other, changing from a solid state ice to a liquid state water, and therefore energy is being absorbed.

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

Contained in chromosomes which are located in the nucleus of the cell.