________ are chemical messengers that are released by cells and transported in the bloodstream to alter the activities of specif
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<h2><u>Question</u><u>:</u>-</h2>
The reaction in which more reactive element replace a less reactive element from its compound is called displacement reaction.
Ex:-
Answer:
+4
Explanation:
, Oxygen always works with -2. You multiply with the number of atoms -2*3= -6
S=x+(-6)=-2
x-6=-2 -> x= -2+6 -> x= +4