In science i really need answers in the book for my assignments.
1) which is neutral? neutron, proton, both a & b, or neither a nor b
2) it is a basis for an atom's individuality? neutron, proton, both a or b, or neither a nor b
3) it is responsible for the mass of an atom? nuetron, proton, both a or b, or neither a nor b

Will give brainliest! jay rides his 2.0-kg skateboard. he is moving at speed 5.8 m/s when he pushes off the board and continues to move forward in the air at 5.4 m/s. the board now goes forward at 13 m/s. a. determine jay’s mass. b. determine the change in the internal energy of the system during this process.(express your answer to two significant figures and include the appropriate units.)

Ms. hidalgo opens the door to her classroom. her classroom is 60 degrees and the air outside is 80. predict what will happen using your knowledge of how heat flows.

Estimate the change in the gibbs energy and molar gibbs energy of 1.0dm3 of octane when the pressure acting on it is increased from 1.0 atm to 100 atm. the mass density of octane is 0.703 g cm−3