The atomic number is the number of protons in the nucleus: 11
Answer:
4 Fe + 3 O2 ⇒ 2 Fe2O3
Explanation:
iron metal reacts with oxygen gas to produce solid iron (III) oxide.
Fe + O2 ⇒ Fe2O3
4 Fe + 3 O2 ⇒ 2 Fe2O3
Answer:
The answer to your question is below
Explanation:
This student is wrong.
Chemical bonds are forces that hold atoms together to form a molecule or compound. These interactions are inside the molecule. Example
Ionic bond: NaCl (sodium and chlorine).
Intermolecular forces are weaker than chemical bonds and they are forces between atoms or molecules. These interactions are among different molecules.
Example
Two molecules of water interact forming hydrogen bridges.
Answer:
Acid rain results when sulfur dioxide (SO2) and nitrogen oxides (NOX) are emitted into the atmosphere and transported by wind and air currents. The SO2 and NOX react with water, oxygen and other chemicals to form sulfuric and nitric acids. These then mix with water and other materials before falling to the ground.
12)
Answer: an endothermic reaction is where there is absorption of energy during the reaction. The energy of reactants is less than the energy of products.
As the enthalpy of the reaction is the difference in the total enthalpy of formation of products and total energy of formation of reactants and in endothermic reaction enthalpy is positive.
thus the energy of products is more than the energy of reactants.
The true statement is :The overall enthalpy of the system increases during the change.
Question 13
If the volume is lowered to one fourth it will increase the concentration (moles/volume). Thus, It will increase because the concentration of the reactants increases.
Question 14
As the value of equilibrium constant is in multiple of thousand, the reaction will be more favourable in forward direction hence
Ans: The equilibrium reaction mixture will have a very high concentration of products.
Question 15
As the system is in equilibrium and by decreasing the concentration of reactant we are disturbing the equilibrium state. In order to maintain the equlibrium the system will move in backward direction and hence
The rate of reverse reaction increases.