Which of the following are oxidation-reduction reactions?
I. PCl3 + Cl2 → PCl5

II. Cu + 2AgNO3 → Cu(NO3)2 + 2Ag

III. CO2 + 2LiOH → Li2CO3 + H2O

IV. FeCl2 + 2NaOH → Fe(OH)2 + 2NaCl

There are 6.022, 104 atoms of hg in 1 mole of hg the number of atoms in 45 moles of hg can be found by multiplying 4.5 by 6.022, 102 which is the number of atoms in 4.5 moles of hg, correctly written in scientific notation with the correct number of significant figures? 0 21,109 0 21,100 271, 1024 27.099, 100 mark this and retum save and exit submit

When hydrochloric acid reacts with potassium hydroxide solution, the following reaction occurs. hcl (aq) + koh (aq) h2o (l) + kcl (aq) the reaction gives off heat energy, so it is an reaction.

Which rate indicates the number of children that would be born per woman if she were to live to the end of her child bearing years