Answer: Covalent type of bonding does a material most likely have if it has a low melting point, does not dissolve in water and has a dull appearance.
Explanation:
A covalent bond is a bond formed by sharing of electrons between the combing atoms. The bond through with these atoms are combined is called covalent bonding.
Some characteristics of non-metals are as follows.
Covalent compounds have low melting point.
Being non-polar in nature covalent compounds do not dissolve in water.
They are brittle in nature.
Thus, covalent type of bonding does a material most likely have if it has a low melting point, does not dissolve in water and has a dull appearance.
Answer:
d). A catalyst lowers the activation energy for a chemical reaction.
Explanation:
From the given choices, it is true that a catalyst lowers the activation energy for a chemical reaction.
The activation energy is the energy barrier that must be overcome before a chemical reaction can occur.
Some reactions have very high activation energy and would not occur without the introduction of a catalyst.
The catalyst brings the reactants into contact by removing the energy deficiency in the system.
What is this about we need more information
Explanation:
The fluids seperated because of the different density of the liquids. The lower liquid has a high density while the liquid on top has a low density
Different between potential energy and mechanical energy