Answer:
The difference between the energy of the reactants and the energy of the products is called the enthalpy change (∆H) of the reaction. For an exothermic reaction, the enthalpy change is always negative. In an endothermic reaction, the products are at a higher energy than the reactants.
Explanation:
Answer: 
, 
and 
are formed at the end of the reaction. They are named as tin (IV) oxide or stannic oxide, nitrogen dioxide and water respectively.
Explanation: Reaction of tin and nitric acid is given as:
Three products are formed at the end of the reaction which are:
- which is termed as stannic oxide or Tin (IV) oxide. This is a white colored solid.
- which is termed as nitrogen dioxide. These are brown colored fumes.
- which is termed as water.
At the starting tin was a silvery-white colored solid and after the reaction, it changed the color to milky-white. This change in color is due to the chemical reaction happening between tin and nitric acid.
Release of brown fumes are also an indication that a chemical reaction has taken place.
High because obvs , ph is around the last letter in the alphabet so the ph is going to be high as well , hope this is correct
I don't know what you are asking but AC= Alternative current
V= Volt
Answer:
The correct answer is working theories.
Explanation:
The theories that combine skills, knowledge, and attitudes taken from the experiences with places, individuals, and things are known as working theories. These theories function in monitoring events, making sense of experience, and solving issues, and create in order to turn more applicable and useful, more interconnected, and elaborate. The working theories are supported by certain proofs, however, they are not the basis for a field study yet.
