A 50.0 ml solution of 0.0319 M benzylamine(pKb 4.66) was titrated with 0.0500 M HCI . Calculate the PH at the following volumes of added acid: Va= 2, 12, 2 Ve, Ve and 40.0 ml.

Esign techniques and materials that reduce the negative environmental impact of a structure are referred to as

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 of these statements best explains why space exploration should be encouraged? it prepares humans to live without oxygen. it dispel myths about objects in space. it prevents comets and asteroids from striking earth. it creates technology to absorb harmful radiations in space.