Answer:
The difference between a physical reaction and a chemical reaction is composition. In a chemical reaction, there is a change in the composition of the substances in question; in a physical change there is a difference in the appearance, smell, or simple display of a sample of matter without a change in composition.
Explanation:
Answer:
Explanation:
Plasma is the 4rth state of matter
Plasma is essentially composed of mixtures of ions and electrons .the ions and electrons are mixed containing equal amounts of positive and negative charges .
Answer:
(NH4)2CO3(s) → 2 NH3(g) + CO2(g) + H2O(g)
Explanation:
The balanced equation can be written when we know the chemical formula of each reactants and products of the reaction.
Ammonium carbonate = (NH4)2CO3(s)
Ammonia = NH3(g)
carbondioxide = CO2(g)
water = H2O(g)
The ammonium carbonate was decomposed in the reaction , so ,
(NH4)2CO3(s) → NH3(g) + CO2(g) + H2O(g)
The reactant is on the left side while the product is on the right side. Let us balance the equation to make sure every atom of element is same number on both sides of the equation.
(NH4)2CO3(s) → 2 NH3(g) + CO2(g) + H2O(g)
Answer:
Explanation:
Tarnish
ing
Tarnishing is a chemical property.
One substance changes into another substance with different properties. For example, the tarnish on silverware is formed by the reaction of silver with hydrogen sulfite to form black silver sulfide.
2Ag + H₂S ⟶ Ag₂S + H₂
Freezing
Freezing is a physical property, because the composition of the substance does not change. After liquid water has frozen to ice, it is still water, but in the solid state.
H₂O(ℓ) ⇌ H₂O(s)
Rusting
Rusting is a chemical property, because a new substance with different properties is formed.
A simple equation for the formation of rust is
2 Fe + 3O₂ + H₂O ⟶ Fe₂O₃·H₂O
