How many electron does a Florine ion (F-) have?
A. 19
B. 20
C. 21
D. 22

Why is the bond angle in a water molecule less than the bond angle of methane? a. the central oxygen atom in water has two lone pairs of electrons, whereas the central carbon atom in methane has no lone pairs. b. the central hydrogen atom in water has one lone pair of electrons, whereas the central carbon atom in methane has two lone pairs. c. the central oxygen atom in water has four lone pairs of electrons, whereas the central carbon atom in methane has only one lone pair. d. the central oxygen atom exerts more repulsive force on surrounding atoms than the central carbon atom in methane does. reset next

Determine the reaction and balance the following equations urgent due in the morning

When a device is used in a circuit in which the voltage is 81 v the current flowing through the device is 3 a what is the resistance of the device