Correct answer: 3. ![Mg^{2+}(aq) + 2 F^{-}(aq) --> MgF_{2}(s)](https://tex.z-dn.net/?f=%20Mg%5E%7B2%2B%7D%28aq%29%20%2B%202%20F%5E%7B-%7D%28aq%29%20--%3E%20MgF_%7B2%7D%28s%29%20%20%20%20)
The given chemical reaction is between ammonium fluoride and magnesium chloride to form magnesium fluoride and ammonium chloride.
The balanced chemical equation representing the reaction will be,
![2NH_{4}F (aq) + MgCl_{2}(aq) -->MgF_{2} (s) + 2NH_{4}Cl (aq)](https://tex.z-dn.net/?f=%202NH_%7B4%7DF%20%28aq%29%20%2B%20MgCl_%7B2%7D%28aq%29%20--%3EMgF_%7B2%7D%20%28s%29%20%2B%202NH_%7B4%7DCl%20%28aq%29%20%20%20%20)
The complete ionic equation for the reaction: All the compounds soluble in water (aqueous) will split into ions,
will not split into ions as it is insoluble in water.
![2 NH_{4}^{+}(aq) + 2 F^{-}(aq) + Mg^{2+}(aq) + 2 Cl^{-}(aq) --> MgF_{2}(s) + 2 NH_{4}^{+}(aq) + 2 Cl^{-}(aq)](https://tex.z-dn.net/?f=%202%20NH_%7B4%7D%5E%7B%2B%7D%28aq%29%20%2B%202%20F%5E%7B-%7D%28aq%29%20%2B%20Mg%5E%7B2%2B%7D%28aq%29%20%2B%202%20Cl%5E%7B-%7D%28aq%29%20--%3E%20MgF_%7B2%7D%28s%29%20%2B%202%20NH_%7B4%7D%5E%7B%2B%7D%28aq%29%20%2B%202%20Cl%5E%7B-%7D%28aq%29%20%20%20%20)
The net ionic equation will be:
![Mg^{2+}(aq) + 2 F^{-}(aq) --> MgF_{2}(s)](https://tex.z-dn.net/?f=%20Mg%5E%7B2%2B%7D%28aq%29%20%2B%202%20F%5E%7B-%7D%28aq%29%20--%3E%20MgF_%7B2%7D%28s%29%20%20%20%20)
Here the spectator ions are ![NH_{4}^{+} and Cl^{-}](https://tex.z-dn.net/?f=%20NH_%7B4%7D%5E%7B%2B%7D%20and%20Cl%5E%7B-%7D%20%20%20%20)
Nitrous oxide will stay in the atmosphere the longest.
Answer:
Explanation:
NaCl = Na⁺ + Cl⁻
6120 ions of NaCl will contain 3060 ions of Na⁺ and 3060 ions of Cl⁻ , forming 3060 molecules of NaCl .
6.02 x 10²³ molecules of NaCl = 1 mole
3060 molecules of NaCl = 3060 x 10⁻²³ / 6.02 moles
= 508.30 x 10⁻²³ moles
= 5.08 x 10⁻²¹ moles
Answer : 5.08E-21 moles .
H2So4 is a strong acid and a strong electrolyte which means that when this dissociates in water, the dissociation process is complete. The first dissociation is
H2 SO4 = H + HSO4-
This can further release H+ and dissociate SO4- instead already
Penurunan atau kehilangan massa otot bisa menimbulkan penurunan berat badan yang tidak direncanakan