Answer:
Water's high heat of vaporization allows dogs to cool themselves by panting.
Explanation:
Vaporization or Evaporation is the process in which the substance is converted into gas (vapors). This is an endothermic reaction and requires energy to be carried out. In dogs this phenomenon is being carried out in order to cool the body.
As the water molecules are evaporated it results in the removal of highly energetic molecules leaving a low energy molecules behind. Hence, cooling is achieved.
Answer: Law of Conservation of Mass.
Explanation:
Law of Conservation of Mass states that during a chemical reaction mass neither created nor be destroyed or total mass of the reactants is equal to the total mass of the products in balanced chemical equation.
Total mass on the reactant side :
(Mass of one methane molecule + mass of two oxygen molecules)
=
Total mass on the product side :
(Mass of one carbon-dioxide molecule + mass of two molecules of water):
=
Total mass on the reactant side = Total mass on the product side = 80 u
The SI unit for the amount of substance present is the mole.
The mole is defined as the amount of substance that has the same amount of particles as there are atoms in 12 grams of carbon-12. Mathematically, the moles of a substance may be computed using:
moles present = mass of substance / molecular mass of substance