Dip a paper clip into water and then slowly pull it out. You'll find that for a short distance, the water is brought up with the metal. Are these adhesive or cohesive forces at work?
A) These are the adhesive forces between the water and the metal (two different materials). The type of molecular interactions going on are dipole-induced dipole.
B) These are the adhesive forces between the water molecules. The type of molecular interactions going on are dipole-induced dipole.
C) These are the adhesive forces between the water and the metal (two different materials). The type of molecular interactions going on are dipole-dipole.
D) These are the cohesive forces between the water molecules. Water has such a strong attraction for itself that it will cling to the water on the paper clip until the force of gravity is stronger than its cohesive forces.
Question 2
If you mix a typical iodine ion (I, atomic no. = 53 ) with a typical barium ion (Ba, atomic no. = 56 ), what compound is formed?
A) BaI2
B) BaI
C) Ba56I53
D) Ba2I
E) Ba2I2
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Find the magnitude and the direction of the resultant vector of the vectors below.