What is a reaction rate? A. The frequency of reactant collisions
B. The amount of products produced in a reaction
C. The speed at which a reaction occurs
D. The energy required for a reaction to happen

This drawing shows a human body system. what is the primary function of this body system?

Analyze how limestone is weathered and identify the features that are formed as a result of this dissolution

1) which of the following is the best example of a physical change? a) sugar dissolving in tea b) firefly glowing 2) in the combustion of ethane, what is/are the reactants? c2h6 + o2 ==> co2 + h2o a) c2h6 and o2 b) co2 and c2h6