C12H26 molecules are held together by ________.
A) ion-ion interactions
B) hydrogen bonding
C) ion-dipole interactions
D) dipole-dipole interactions
E) dispersion forces
Question 2
The value of H for the following reaction is -3351 kJ: 2Al (s) + 3O2 (g) 2Al2O3 (s) The value of Hf for Al2O3 (s) is ________ kJ.
A) -3351
B) -1676
C) -32.86
D) -16.43
E) +3351
Question 3
Elements in Group 7A are known as the ________.
A) chalcogens
B) alkali metals
C) alkaline earth metals
D) halogens
E) noble gases