**15 PTS* GUYS THIS QUESTION WONT LET ME PASS UNLESS I GET IT RiGHT HELPPP IVE BEEN SITTING FOR 3 HOURSA sample of hydrogen gas occupies 50,4 L at STP. This sample
contains how many moles of hydrogen atoms?!

Give the orbital configuration of the phosphorus (p) atom.

How do you lengthen a pattern piece? (family and consumer science, sewing)

Dumbledore decides to gives a surprise demonstration. he starts with a hydrate of na2co3 which has a mass of 4.31 g before heating. after he heats it he finds the mass of the anhydrous compound is found to be 3.22 g. he asks everyone in class to determine the integer x in the hydrate: na2co3·xh2o; you should do this also. round your answer to the nearest integ