Which pair of compounds is soluble in water?
A) Ag Cl and AgBr
B) CoS and K2S
C) NaI and Cu(NO3)2
D) NH4NO3 and BaCO3
Question 2
Calculate the wavelength of an electron (m = 9.11 10-28 g) moving at 3.66 106 m/s.
A) 1.99 10-10 m
B) 5.03 10-10 m
C) 1.81 10-10 m
D) 5.52 10-9 m
E) 2.76 10-9 m