Someone please help me with these two problems. I will give the formula too from above the question is: 1. How much heat is lost when a 500g sample of copper is cooled from 450 degrees celsius to 20 degrees celsius

2. How much heat is gained when a 20g mercury thermometer is raised from 25 degrees celsius to 35 degrees celsius

This flow chart shows the amount of energy that is emitted by each type of light. ultraviolet > blue light > yellow light > red light (maximum energy) (minimum energy) in an experiment, shining which type of light on a strip of metal would be least likely to produce the photoelectric effect? ultraviolet light dim blue light bright red light bright yellow light

What is the mass of 0.46 mol of mgcl2

When water dissociates, each water molecule splits into a hydroxide ion and a) h 3 o + b) a hydrogen atom c) a hydrogen ion d) h 2 o e) oh —