What is the percent yield of ferrous sulfide if the actual yield is 220.0g and the theoretical yield is 275.6g

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

Explain that newton first law, second law and third law of motion?

Can someone me with 3 and 4 plz. this is for masteries test.