Several analytical techniques are based on the absorption of energy from different parts of the electromagnetic spectrum. The following diagram shows part of the electromagnetic spectrum X-rays
P
Visible
Q
Microwaves​

Newtons second law deals most cosely with

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

An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.