Aballoon is a sphere with a radius of 5.0 m. the force of the air against the wall of loan is 45 n. what is the air pressure inside the balloon ? (surface area = 12.56 x radius 2, 1 pa = n/m^2)

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

Which metal exist in liquid state and can be cut with knife ?

Identify arrows pointing to bonding electrons. done h-0-0-h ) intro