(30 Points!) What is the relative size and composition of the universe, a galaxy, and a solar system?

Select the atomic models that belong to the same element

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

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?