They have different number of Neutrons and protons, so their masses are different
Hope this helps!
Answer: the enthalpy of reaction is, -155 kJ
Explanation:-
According to Hess’s law of constant heat summation, the heat absorbed or evolved in a given chemical equation is the same whether the process occurs in one step or several steps.
According to this law, the chemical equation can be treated as ordinary algebraic expression and can be added or subtracted to yield the required equation. That means the enthalpy change of the overall reaction is the sum of the enthalpy changes of the intermediate reactions.
The final reaction is:
The intermediate balanced chemical reaction will be,
(1)
(2)
(3)
Now multiplying (3) by 2 and adding all the equations, we get :
Therefore, the enthalpy of reaction is, -155 kJ
Explanation:
As a number of glassware are used in lab experiments so it is necessary that they should be cleaned properly after and before the experiment.
This can be done as follows.
1). At first acetone is used to rinse the glassware. If water soluble contents present in the glassware then use deionized water after rinsing it with acetone and if ethanol soluble components are present there then rinse with ethanol followed by rinses with deionized water.
2). When glassware are dirty in such a manner that they cannot be washed immediately then soak them in water for a certain period of time. This can help in removing the dirt or chemicals easily from the glassware.
3). The laboratory glassware can be easily washed with detergents or products like lab wash, alconox etc. Once these glassware are thoroughly cleaned then rinse them 3 times with deionized water.
I hope this helps . This is kinda step by step
Answer: It can form four covalent bonds
Explanation: