If a student wanted to design an experiment that uses sound scientific principles which of the following should she or he not do

A+b→2c when the reaction begins, the researcher records that the rate of reaction is such that 1 mole of a is consumed per minute. after making changes to the reaction, the researcher notes that 2 moles of a are consumed per minute. what change could the researcher have made to effect this change?

The agent of mechanical weathering in which rock is worn away by the grinding action of other rock particles is call

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