What volume in milliliters will 0.012 g H2 gas occupy at STP?

Which traits do human embryos have that link them to a common ancestor with fish and reptiles? a. scales and tail b. gill slits and scales c. tail and gill slits d. hair and tail

What is avogadro’s number, and why is it useful

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.