If you have 8.36 x 1026 molecules of H2O.  How many moles of H2O do you have? A)  13.9 mole B) 1390 mole C) 5.03 x 1050 moles D) 0.000720 moles

Which of the following pair of molecules below can have hydrogen bonding? (a)  HBr  + H2O                 (b)  HF + HBr                  (c) NH3  + HF                   (d)  H2O  + CH4               

The total number of nonmetallic atoms in Mn2(C2O5)4 is  

Both gas and liquid share the following property: indefinite volume definite shape and volume   c. definite shape   d. definite shape and indefinite volume   e. no correct answer given

The following elements with the smallest electronegativity is

An example of a molecule with a nonpolar covalent bond is KBr HCl CO NF No correct answer given  

Which atom has six valence electrons?

What is the mole of 2.50 L oxygen at 325oC and 83.2 atm?  The gas constant is 0.0821 L atm/ K mol.         (a)  0.128 mol               (b) 4.24 mol              (c)  0.236 mol               (d)  42.4 mol            (e)  7.80 mol

Which of the following formulas (Lewis structures) has a total of  7 bonding pair of electrons ( 14 electrons) and 3 non-bonding pair of electrons (6 electrons)? NH2OBr HCl (Hydrochloric acid) C2H5F CHBr3

What is the major intermolecular forces between H of H2O molecule with N (nitrogen) of another molecule of NH3?