Tarnishing of silver is a chemical property while an apple being cut is a physical property.
Any property which describes the state of a physical system is called as a physical property.Changes in physical properties are used to describe changes between the states. They are often related to as observable properties.
Physical property which can be quantified is a physical quantity. These are also classified further with respect to their directionality. Isotropic properties do not change with direction of observation while anisotropic properties change with direction of observation.
Physical properties are differentiated from chemical properties by the way they determine how a substance behaves in a chemical reaction.
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Answer:
A chemical reaction is a process in which one or more substances (reactants) are transformed into one or more different substances (products). During a chemical reaction, chemical bonds between atoms in the reactants are broken, and new bonds are formed to create the products. This transformation often involves the rearrangement of atoms and the exchange of energy.
Key characteristics of a chemical reaction include:
1. **Reactants:** These are the substances that undergo the chemical transformation. They are present before the reaction begins.
2. **Products:** These are the substances that result from the chemical reaction. They are formed as a result of the rearrangement of atoms from the reactants.
3. **Chemical Equations:** Chemical reactions are typically represented using chemical equations, which show the reactants on the left side and the products on the right side. For example, the reaction between hydrogen and oxygen to form water is represented as: 2H2 + O2 → 2H2O.
4. **Conservation of Mass:** In a closed system, the total mass of the reactants is equal to the total mass of the products, according to the law of conservation of mass.
5. **Energy Changes:** Chemical reactions may release or absorb energy. Reactions that release energy are exothermic, while those that absorb energy are endothermic.
Chemical reactions are fundamental to chemistry and play a crucial role in various natural and industrial processes. They are involved in everything from the digestion of food in our bodies to the combustion of fuel in engines, and they underlie the synthesis of a wide range of substances, from pharmaceuticals to materials used in everyday life. Understanding and controlling chemical reactions is essential in fields such as chemistry, biology, and engineering.
Answer:
a chemical reaction is a process in which two or more chemicals react with each other
a. 0.61 years
b. 0.76 years
c. 1.24 years
d. 1.39 years
Answer:
b. 0.76 years
Explanation:
Mercury is the closest planet to the Sun and the Earth is the third planet from the Sun.
The orbital period of the Earth is 1 year.
Orbital period of the Mercury is 88 days = 0.24 years (Earth years)
Thus, the difference between the orbital periods of Mercury and Earth is
1 year - 0.24 years = 0.76 years
Thus, the correct option is b.