Cathy conducts a scientific investigation. how can she make sure her results are valid? a. repeat the investigation several times b. confirm that her results match her hypothesis c. write a report about her results d. use metric measuring units during her investigation pls it's science by the way.

Melting and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

The human eye contains a molecule called 11-cis-retinal that changes shape when struck with light of sufficient energy. the change in shape triggers a series of events that results in an electrical signal being sent to the brain that results in vision. the minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164 kj/mol.

Calculate the mass of carbon in 97.0 g of sucrose c12h22o11