Which is the correct rate-
Given a reaction mechanism that has an overall reaction of 20,
determining step?
O O3 + 20 30
O 02+0 - 0
O 0 = 0 + 0
O 0; +0 - 20

Can someone me with questions 12 and 13 plz.

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

How many protons, electrons, and neutrons are in each of the following isotopes? a. zirconium-90 b. palladium-108 c. bromine-81 d. antimony-123