Which of the following is an example of qualitative observation? select one of the options below as your . a. joseph is observing the color difference in the reaction mixture of each of the test samples to see what types of proteins are present in them.. b. joseph is measuring the color of the reaction mixture colorimetrically to see the concentration of proteins in the sample.. c. joseph is observing the color of the reaction mixture to see whether proteins are present in the given solution..

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 empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5

What can be done to make a solid solute dissolve faster in a liquid solvent?