Evelyn is making a model of Earth to show how the physical layers correspond to the following compositional layers. Which of the following claims should Evelyn show in her model?

5g of ammonium nitrate was dissolved in 60g of water in an insulated container. the temperature at the start of the reaction was 23.0°c and at the end it was 19.0°c. calculate the energy absorbed by the reaction.

What is the power rating of the lightbulb if 3.0 a flow through it when connected to a 15 v battery

Aprotein molecule in an electrophoresis gel has a negative charge. the exact charge depends on the ph of the solution, but 30 excess electrons is typical. what is the magnitude of the electric force on a protein with this charge in a 1600n/c electric field? write in two significant numbers, and also in newton