1. Draw the structural formulas for each molecule and identify polar covalent bonds by assigning th
slightly positive (8+) and slightly negative (8-) symbols to the appropriate atoms.
a. NH,
5. Which would you expect to have the higher melting point, CaO or CS,?
b. CF,

b.

the accuracy of the data.

percent abundance for cu-63 can be shown as:

63 x + 65 (1-x) = 62.9296

65 - 62.9296 = 2 x

x = 1.035

thus, percent abundance for cu-63 is 1.035

percent abundance for cu-65 can be shown as:

63 x + 65 (1-x) = 64.9278

65 - 64.9278 = 2 x

x = 0.0361

thus, percent abundance for cu-63 is 0.0361

the mass spectrum of cu-63 showing the intense peak as, this isotope is found in nature more abundantly around 92.38 % in comparison to cu-65 which is found 62.58 % naturally

the answers are

c and c