Use the balanced equation [Cu + 2AgNO3 -> 2Ag + Cu(NO3)2] and your calculated percent yield (78.2%) to calculate how many grams of copper you’d need to use in order to produce 2.00 grams of silver? Show your work!

How are elements arranged in a periodic table

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

May someone me with these science questions