2. What is the oxidation half-reaction for this unbalanced redox equation? Cr207 2-+ Fe 2+_ Cr3+ + Fe 3+

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

All cells are made of four types of acids, lipids, proteins, and carbohydrates.

How many moles of al3+ ions are in 1.25 moles of al2o3