Control group: 50 dogs continuing their normal diet
Experiments group: 50 dogs chosen to eat the new food
Independent variable: dog food
Dependent variable: the dogs’ weight
Answer:
The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom
B. It is the heat required to change a gram of substance from solid to liquid
<h2>Answer:</h2>
Option D is correct. It is independent of the reaction pathway.
<h2>Explanations:</h2><h2>What is Hess's law?</h2>
Hesslaw states that the enthalpy change of a reaction does not change regardless whether the reaction takes place in a single or multiple reaction pathways.
This shows that the total entalpy change of a reaction does not depend on the reaction pathway.
Because a copper ion looses electrons, meaning it's negatively charged, and positives and negatives attract.
