A 520-gram sample of seawater contains 0.317 moles of NaCl. What is the percent composition of NaCl in the water?

A: 1.1%
B: 2.8%
C: 3.6%
D: 6.1%

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

If an area has high air pressure and low humidity, what type of weather will it most likely have? plz !

Which are forms of frozen water? check all that apply. dew frost hail rain sleet