Which reactions are the reverse of one another? condensation and addition
addition and elimination
elimination and condensation
substitution and addition

Which statement describes the appearance of a temperature-vs.-time graph? a horizontal line shows that the temperature increases at a constant rate over time. a vertical line shows that the temperature decreases at a constant rate over time. horizontal lines where the temperature is constant during phase changes connect upward-sloping lines where the temperature increases. horizontal lines where the temperature increases are connected by upward-sloping lines where the temperature is constant for each phase.

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.

How many moles are contained in 5.6 l of h2 at stp