What volume of hydrogen (in L) is produced from the complete reaction of 56.49 g of
magnesium metal at STP?

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

1.solid

2.carbon dioxide

3.helium

28528289 29823282 8298232 39858