Explain why it is advantageous that water does not evaporate quickly on earth

PLEASE HELP!!

What’s the percent by mass of carbon in c10h14n2

Kc = 0.040 for the system below at 450oc. if a reaction is initiated with 0.40 mole of cl2 and 0.40 mole of pcl3 in a 2.0 liter container, what is the equilibrium concentration of cl2 in the same system? pcl5(g) ⇄ pcl3(g) + cl2(g)

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure