What mass of manganese(ii) chloride must react with sulfuric acid to release 48.5 ml of hydrogen chloride gas at stp? mncl2(s)+h2so4(aq)→mnso4(aq)+2hcl(g )

answer; ///i do believe that the correct answer is (b); ///particle composed of two or more atoms bonded together;

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e