Bacteria in the human mouth release enzymes to break up sucrose, and then polymerize glucose to form a bacterial plaque. When this glucose is digested, it forms lactic acid, which causes tooth decay. Tooth enamel is made of calcium phosphate. Lactic acid has a Ka 1.38x10-4 and ionizes into lactate and H3O+ ions. Assuming an initial lactic acid concentration of 0.10 mol/L on your tooth, determine the pH (assume a 1:1:1 mole ratio) and the percent ionization. Should people be concerned with plaque buildup? Justify your answer.

100mg magnesium reacts with 20ml of 1.0m hcl

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