Cu có hai đồng vị là 63cu và 65cu biết rằng M cu = 63.54. Nếu như có 500 nguyên tử Cu thì trong đó có bao nhiêu nguyên tử là 63 Cu

Compare and contrast physical changes with chemical changes.

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

Acetylene gas c2h2 undergoes combustion to produce carbon dioxide and water vapor how many grams of water are produced by the same amount of c2h2?