(Multiple Choice, 30 pts)

Which is evidence that the reaction below is a redox reaction?
2Na + Cl2 → 2NaCl

A. The sodium atom is a pure element as a reactant and becomes part of a compound.
B. Two different elements take part in the reaction.
C. Oxidation occurs to both elements in the reaction.
D. There are no ions in the equation.

Two things that biomedical has invented or innovated

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 moles of carbon dioxide will form if 2.5 moles of c3h8 is burned