5.Samples of baking soda and vinegar at room temperature are mixed together. The resulting solution has a lower temperature than the original temperature of the vinegar. Which statement correctly describes how the system could be modified so that thermal energy is absorbed faster? A. Decrease the amount of baking soda used.
B. Increase the concentrations of the chemicals used.
C. Increase the size of the container used.
D. Decrease the temperature of the environment so more energy flows away from the 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

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?

If we compare and contrast electromagnetic waves with sound waves, all but one statement is true. that is a) sound waves require a medium to travel while electromagnetic waves do not. b) electromagnetic waves can travel through the vacuum of space while sound waves cannot. c) electromagnetic waves must have a medium in which to travel, but sound waves can travel anywhere. eliminate d) sound waves must bounce off of matter in order to travel while electromagnetic waves do not require matter to be present.