Answer:
Na + Cl ⇒ NaCl
Explanation:
Skeleton equation: Na + Cl ⇒ NaCl
This is already balanced so that is the answer.
Answer:
AB + CD ----> AC + BD
Explanation:
If you think this reaction:
AB + CD ----> AC + BD
(Reactants) (Products)
All the statements are true.
We know 1 mole of any atom or molecules contains
atom or molecules.
1 mole of HBr i.e 81 gm/mol contains
atom or molecules.
So, mass of
molecules is :

Therefore, mass of
molecules is 1.21 gm .
Hence, this is the required solution.