Answer: Option (3) is the correct answer.
Explanation:
Molecular substances are the substances which have two or more different atoms attached together.
Molecular substances have weak intermolecular forces of attraction thus, they have low melting and boiling point.
They have poor electrical conductivity as the bond formation in molecular compounds is covalent. Therefore, they also have poor heat conductivity.
Hence, out of the given options low melting point is the characteristic property of molecular substances.
Answer:
I might be wrong i'm not sure
Explanation:
Chemical reactions often involve changes in energy due to the breaking and formation of bonds. Reactions in which energy is released are exothermic reactions, while those that take in heat energy are endothermic.
Answer:
Explanation:
4NH₃ + 3O₂- --> 2N₂ + 6 H₂O
4 mole 3 moles 2 moles 6 moles
4 moles of NH₃ reacts with 3 moles of oxygen
1.37 moles of NH₃ reacts with 3 x 1.37 / 4 mols of oxygen
corresponding amount of O₂ = 3 x 1.37 / 4 mols
= 1.0275 moles
corresponding amount of N₂ = 2 x 1.37 / 4 moles
= .685 moles
corresponding amount of H₂O = 6 x 1.37 / 4 moles
= 2.055 moles
Given amount of product N₂ = 3.82 moles
corresponding amount of NH₃ = 4 x 3.82 / 2 moles
= 7.64 moles
corresponding amount of O₂ = 3 x 3.82 / 2 moles
= 5.73 moles
corresponding amount of H₂O = 6 X 3.82 / 2 moles
= 11.46 moles .
The noble gas configuration means that the electronic configuration for Lithium is written in shortcut by starting with the symbol for the nearest noble gas. Note that the noble gas should be lighter than the said element. In here, the nearest noble gas to Lithium is Helium (He). Then, add the additional electrons. Thus, the noble gas configuration would be: <em>[He]2s¹.</em>