How many oxygen atoms are in this formula 4h2o

Why is the vapor pressure of a warm lake higher than the vapor pressure of a cold lake? o a. warm water has a greater heat of vaporization. ob. warm water evaporates more quickly. cool water evaporates more quickly. od. cool water has a greater heat of vaporization.

Draw two cyclic constitutional isomers of cis-1

What is calcium oxide+diphosphorus pentoxide--> calcium phosphate balanced