Answer:
CO2
Explanation:
(I Just took the test)
At STP 1 mol=22.4 Liters, so we now know that it is asking for which of the gasses has a molar mass of 44, and CO2 is th only one with that molar mass
Answer:
Chloride (Cl⁻) and sodium (Na⁺) ions.
Explanation:
Hello,
In this case, since the aqueous species are actually dissociated when reacting and the solid species (ferric carbonate) remains undissolved, we can modify the given reaction as follows:
![FeCl_2(aq) + Na_2CO_3(aq) \rightarrow FeCO_3(s) + 2NaCl(aq)](https://tex.z-dn.net/?f=FeCl_2%28aq%29%20%2B%20Na_2CO_3%28aq%29%20%5Crightarrow%20FeCO_3%28s%29%20%2B%202NaCl%28aq%29)
In such a way, dissociating the aqueous species we obtain:
![Fe^{2+}(aq)+2Cl^-(aq) + 2Na^+(aq)+CO_3^{2-}(aq) \rightarrow FeCO_3(s) + 2Na^+(aq)+2Cl^-(aq)](https://tex.z-dn.net/?f=Fe%5E%7B2%2B%7D%28aq%29%2B2Cl%5E-%28aq%29%20%2B%202Na%5E%2B%28aq%29%2BCO_3%5E%7B2-%7D%28aq%29%20%5Crightarrow%20FeCO_3%28s%29%20%2B%202Na%5E%2B%28aq%29%2B2Cl%5E-%28aq%29)
It means that the net ionic equation is:
![Fe^{2+}(aq)+CO_3^{2-}(aq) \rightarrow FeCO_3(s)](https://tex.z-dn.net/?f=Fe%5E%7B2%2B%7D%28aq%29%2BCO_3%5E%7B2-%7D%28aq%29%20%5Crightarrow%20FeCO_3%28s%29)
Therefore, the spectator ions are those were cancelled out, chloride (Cl⁻) and sodium (Na⁺).
Best regards.
The researcher may first weight the beaker with water and then start to heat the water to a constant temperature, for example 30 °C and then start adding salt and stirring. He should add salt slowly until solid salt starts to become visible and the solution starts becoming cloudy. When this happens, he should quickly weigh the beaker. The increase in mass is the mass of salt dissolved at that temperature.
The procedure is then repeated but at an increased temperature until 5-6 temperatures have been tested.
Answer:
Hydrogen bonding occurs when a hydrogen atom is covalently bonded to N, O, or F atom.