Guanidine is a stronger base than the typical amine. The increased basicity can be explained by drawing the resonance structures of the protonated guanidine. The protonated guanidine (A) has been drawn for you. Draw major resonance structures, one each in boxes B and C, and one minor resonance structure in Box D. Be sure to include the formal charge, lone pairs, and hydrogens on nitrogen for structures B, C, and D.

If a 60-g object has a volume of 30 cm3, what is its density? 2 g/cm3 0.5 cm3/g 1800 g * cm3 none of the above

In a sample of oxygen gas at room temperature, the average kinetic energy of all the balls stays constant. which postulate of kinetic molecular theory best explains how this is possible? a. attractive forces between gas particles are negligible because the particles of an ideal gas are moving so quickly. b. collisions between gas particles are elastic; there is no net gain or loss of kinetic energy. c. gases consist of a large number of small particles, with a lot of space between the particles. d. gas particles are in constant, random motion, and higher kinetic energy means faster movement.

Which of the following compounds does not contain molecules? question 2 options: co2 h2 nacl h2o