The student placed 10 ml of pbcl2 (saturated solution) in the test tube and added a pinch of lead acetate. when the test tube was shaken, a white precipitate of pbcl2 formed. as lead acetate is added, how is this affecting the quantity of pbcl2?

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 type of fossil does this image depict?

Write the chemical formula for a compound that is made of an element from group 1 and an element from group 17