A Styrofoam ball has a mass of 10.7 g and when completely submerged can displace 178 mL of water. What is it's density?

What happened in 2012 and how does it illustrate the importance of understanding the sun and how it works?

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

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?